After getting fired and barred from his previous profession, Mutta is forced to move back in with his parents. Meanwhile, the career of his kid brother Hibito is taking off as he trains to become an astronaut just like Mutta wanted to. But when Mutta receives an offer to train as an astronaut at JAXA, it seems like he might finally be getting the chance to live his dreams.
The two brothers, Mutta and Hibito spotted a UFO in their childhood which led to a promise. Mutta has since forgotten about the promise but Hibito hasn’t and decides to give his older brother a little push.
Aiming for the goal from his youth, Mutta has managed to be accepted for the New Astronaut Selection Exam. He's uneasy about his performance during his second interview though.
As more applicants begin to fall out of the running and the medical exams beginning Mutta realizes people believe his brother's influence is what's allowed him to get so far. On the bright side, Serika seems to taking an interest in him.
As the second round of examinations are coming to a close, Mutta's worries begin to grow. Kenji manages to get Serika's email though in hopes of cheering his friend up.
Hibito invites his brother to visit him at NASA in Houston, Texas. The visit though isn't exactly what Mutta was expecting. Hibito expresses his disappointment in the lack of competitiveness his brother is displaying.
During Mutta's visit with Hibito JAXA learns of the head butting incident that got him fired from his previous job. Could this mean the end of his journey to Mars?
Hibito notices the change in Mutta's behavior and suspects that something isn't right. Meanwhile, Hoshika is struggling to convince another JAXA judge to change his mind about Mutta.
After apprehending the fire extinguisher wielding robber, Mutta has managed to become a hero! To add to the good news his parents inform him he's passed the second examinations.
On his flight returning to Japan Mutta has a dream that leaves him very unsettled. But there's still something to celebrate, Serika, Kenji and he go out in honor of them all making it to the third exam.
With Serika and Kenji’s strong reasons to become astronauts, Mutta starts questioning his motives. On the way to a secret facility, Kenji notices cameras on the bus and part way into the trip each applicant must fill out a survey about the others.
The final fifteen candidates are split up into three teams. Each one is to be sealed in an environment for two weeks to determine who within each group would be ideal astronauts. Their first challenge is to figure out what time it is.
As Serika deals with her hunger she thinks back on the time she asked her father about the meaning of her name. The teams new challenge is to figure out how to manage their food supply.
The exam continues with a variety of mental and physical tasks. The latest one is to write a letter opposing a journalist who is against government funding of space exploration. Reflecting on lecture from his childhood leads Mutta to his stance.
As Naoto recalls how his focus on work kept him from his daughter, his glasses get broken when they are accidentally stepped on by Yasushi. Despite his reduced visibility, Naoto is determined to not let it hinder his capabilities.
Team B is put on edge when an alarm starts going off in the middle of the night. Meanwhile, Team A realizes their clock has gone missing and they end up finding it smashed. Amidst the all of this the applicants are given a new task.
Even with the puzzle challenge complete Team B continues to be plagued by the alarm being controlled by one of the participants. Soon, Team A is facing a food shortage and an alarm issue of their own.
Mutta figures out that Naoto and Yasushi had been given green cards ordering them to break the clock and set off the alarm. Later, Serika confesses about the food shortage to Mutta, who mistakenly believes it to be another order by JAXA.
Mutta is given his own green card, prompting him to make random noises throughout the day. Team B continues facing issues and Kenji is put under pressure to withdraw from the selections.
Mutta reveals they don't have any food left for tomorrow but manages to gather ingredients to make udon. The team is surprised over him knowing Sharon, the happy mood turns though when they remember they must choose two people to become astronauts.
As the last day of the exam arrives, the teams are told to do what they want for the rest of the day. Team A struggles to decide on a method of choosing two astronauts. Mutta suggests they decide via a game of rock-paper-scissors.
The third exam comes an end and Team A is met with applause from the staff. Mutta and Kenji discuss how those who weren't selected may still have a chance, Yasushi, who lost out in the match, visits a much-admired professor.
The JAXA staff discusses which of the remaining candidates to select. It is then revealed that NASA will select one male from the remaining candidates to join the others. This has Mutta reflecting on his lack of good luck.
Mutta hears from JAXA about when he is to depart for Houston and learns that Kenji was in fact chosen alongside him. With the final exam in two months, coinciding with Hibito's mission into space, Mutta decides to head to Houston ahead of schedule.
As Hibito trains to use a space vehicle for his moon mission, Mutta does some lawn mowing for Ozzy. Later, Mutta has dinner with Jennifer and Lowry, Hibito's backup, where he learns the examiner for the final exams will be Takio Azuma.
Mutta witnesses Hibito piloting a jet craft, reminding Mutta of how he came to support him. A week before the launch though, Hibito is moved into quarantine!
After the interviews end, the candidates have a celebratory meal with the examiners. Unbeknownst to the candidates, the interview was a decoy intended to drop their guard as the examiners make observations outside of an exam environment.
When Azuma asks a particularly severe question, Mutta gives an honest reply that is similar to how both Azuma and Hibito answered the same question.
Hibito recalls how Mutta was bullied by those who didn't believe him about the UFO. In order to stop the bullying without resorting to violence, Hibito concocts a plan.
On the night before Hibito's launch, Mutta’s mother visits to expresses her concerns about the it. Even though weather may delay the launch, Hibito is optimistic.
While searching for Apo, Mutta meets a strange NASA employee who takes him to some abandoned training facilities where he gets a spectacular view of the launchpad.
As Hibito and his crew finally make it into space, Mutta remembers when he and Hibito attended a broadcast that gave him the encouragement to become an astronaut.
As the candidates celebrate the launch, they’re told to head back to Japan until the results are announced. Mutta opts to stay in Houston until his brother lands on the moon.
As the Orion approaches the moon for landing, Hibito receives a video from Mutta. The whole of Japan tunes in to watch the live broadcast of the moon landing.
On the moon’s surface, Hibito notices something shiny. Meanwhile, Mutta arrives back in Japan, and becomes paranoid that he’s used up all his luck.
As Kenji receives his call from JAXA, he thinks back to how his life used to be. He particularly remembers how he met the one who told him about the astronaut program.
Serika visits her father's grave after hearing about her results and she recalls her childhood and her inspiration to become an astronaut.
Hoshika decides to help reveal the exam results and, after calling Mizoguchi, he asks an increasingly anxious Mutta to meet him at a park to personally deliver his results.
Mutta heads straight to the conference and gets through it. Later, the gang gets together and Naoto joins them in celebration while Yasushi sends Mutta various texts.
Mutta and the others begin their first day at JAXA, while, on the moon, Hibito and Damian struggle with the tricks the moon plays on perception.
Unable to contact Houston, Hibito is separated from Damian. While searching for his partner, he makes a discovery - but it might be too late.
NASA discusses plans to aid the astronauts, but Hibito’s oxygen is dwindling fast. Mutta is certain he can help save them, but his advice may fall on deaf ears.
Hibito has the option to fire a flare and alert Houston of his position, or use it to help Damian. With ten minutes of oxygen remaining, he decides to take a walk.
Hibito finds the memento left by Brian, his mentor. While reminiscing about him, the oxygen in Hibito’s suit runs out.
While heading back to base, Freddy Saturn and Buddy Walters discuss what Brian taught them. When Mutta and Hibito finally see each other, Hibito gives him another promise.
A visit to Sharon pushes Mutta to fulfill a few promises. Then, as they receive their official jumpsuits, Mutta and the others are given some big news.
The astronaut trainees head to Houston! Mutta attracts some serious attention at the airport, while at NASA, their trainer is selected.
Mutta asks Murasaki about the training program, and later on a party is thrown for the trainees! However, according to one source, Mutta’s future may be uncertain.
Training begins, and it doesn’t start out easy! The group’s first test is a nice walk through the desert as survival training.
Mutta's team find their rations and set up camp for the night, only to be told that they are presently last in the rankings.
Nitta loses his phone, and he is expecting an important call, so he decides to go back and look for it. Mutta, as leader, chooses to go with him.
Mutta and Nitta discuss their relationships with their brothers as they head back to camp. Kazuya researches the astronauts and, perhaps, gains some perspective.
Mutta reminisces about how he was first admitted to the JAXA training program.
Mutta’s recollections continue with his memories of the moon accident.
Continuing his reminiscence, Mutta recalls both his JAXA exams and Hibito’s launch.
When Mutta catches a fever, his team must decide whether to push on for the final day of survival training or retire.
The pressure mounts for Pico as the parachute he designed for Hibito’s return to Earth will soon be put to the test.
Mutta’s team puts their rover’s design to the test as Azuma journeys to the moon.
The mood turns somber as Mutta and Vince share introspective insights.
Vince and Pico reminisce about their childhood friend, Rick, and the tragedy that took place between the three of them.
The time of the launch looms near, forcing Mutta and his team to come up with… innovative solutions to some last-minute design flaws.
Hibito and his two flight mates begin to travel back to Earth as Mutta’s group reflects upon their time together.
Back on solid ground, Hibito, Damian, and Linda begin to acclimate to Earth’s gravity again as Mutta receives a grim premonition.
The AsCans begin a rigorous, three week flight course while Sharon consults a university professor interested in her telescope proposal.
Fearing that she has inherited a lethal disease from her father, Serika undergoes a series of neurological tests.
Mutta meets Deneil Young again, after a more successful attempt at the exam.
After a rocky start in the cockpit of a T-38, Mutta commits to flight training.
Hibito gets ready to meet with JAXA and Sharon in Japan as Mutta faces a challenge in the form of the T-38’s multi-faceted controls.
Sharon’s symptoms have begun to affect her talent for the piano. Meanwhile, Hibito struggles with balancing his obligations to the press and his personal life.
All of his hard work finally pays off as Mutta finishes his pilot training and is officially recognized as an astronaut.
Mutta is offered a spot on an upcoming mission that could prove to be a huge opportunity, but lingering doubts complicate his choice…
Mutta senses that something is off with Hibito as the two are selected to be featured on a magazine cover.
Hibito’s panic disorder is affecting his everyday life, but he is adamant about keeping his condition secret from Mutta.
Mutta submits a proposal outlining an idea to prevent vehicular collisions on the lunar surface.
Mutta’s proposal is well received, though he still struggles to convince Mr. Butler that he’s ready to train for lunar missions.
Having looked into Mr. Butler’s past, Mutta comes up with a plan to convince him to allow his training for lunar missions.
While Mutta persuades Chief Butler to let him begin lunar mission training, Hibito attempts to overcome his panic attacks in Russia.
Hibito wrestles with his emotions while trying to conquer his panic disorder. Ivan Tolstoy, the Russian astronaut, shows Hibito some old videos that may provide inspiration.
With the inspiration provided by Ivan and his daughter, Olga, Hibito once more dives into treatment, and Ivan may have an uncommon method to get the ball rolling.
Hibito prepares to leave Russia as he is given the news that both NASA and JAXA have called him back to Houston to support the teams there.
As Mutta starts NEEMO training in preparation for lunar missions, Hibito returns to Houston.
Mutta ventures underwater with his first NEEMO training and discovers that the sea can be just as deadly as space.
In the ocean, Mutta is excited to be teamed up with Kenji, but this may turn out to be more of a curse than a blessing.
Despite their nearly seamless teamwork, the knowledge that only one of them can make it onto the moon mission may cause both Mutta and Kenji’s performance to suffer.
Being forced to compete with each other for a spot on the moon landing team, Mutta and Kenji are both caught off guard. Can Andy’s counsel save Mutta from himself?
With the shock wearing off, Mutta and Kenji are beginning to calm down and work together to construct their Moonbase.
Hibito keeps up with his treatment in Houston. Meanwhile, Mutta continues to impress people within NASA and finishes his NEEMO training.
Mutta is finished with NEEMO and waiting to hear who’ll be going to the moon. Hibito finishes his therapy and must now prove that he can venture into space once again.
With only a single test standing between Hibito and his reallowance into space, sound counsel comes from an interesting source.
Kenji and Nitta are left trying to discover their own paths after Mutta is chosen.
Hibito prepares to begin the test that will let him know if he can get back to work, but a surprise from Chief Butler awaits him.
While Hibito is undergoing the test that will determine his future, Chief Butler initiates his own test for him, but malfunctions may cause even more issues.
After Hibito’s test results are announced, Mutta gets himself pumped up to begin his backup training for the mission to the moon.
Mutta perseveres through his desert training for his role in the upcoming lunar mission, while Sharon faces NASA with a new lunar telescope pitch.
Having been spoiled to teammates that enjoy working together, Mutta is taken aback as his assigned team seems unable to work as a unit.
The team is assigned a leader, Eddie Jay, and he wastes no time whipping the team into shape with a run and getting them to open up to each other.
As Christmas approaches, Mutta takes a break from his training while Nitta and Kenji are informed of their newest mission.
For New Year’s, Mutta and Hibito are partying together in Houston! While Mutta is having a blast, Hibito seems a little less festive.
With his brother missing, Mutta finds it difficult to focus on his training, but Chief Butler has some supportive words for him.
The launch is just ahead and the two brothers don’t have much time to focus. With Mutta worried about Hibito, he makes a detrimental mistake.