While Mahoro and Suguru are shopping one day they come across an android that is being chased by mecha robots out to kill her.
Minawa is now attending school with Suguru and they are pretending that she is Mahoro's sister. Minawa keeps on messing up and getting injured at school.
Mahoro buys some strange machines so that she can use them to enhance her bust. This does not work so the next day she receives a strange package from Vesper that contains missiles that she can contain in her bra.
Vesper tells Mahoro that a bomb is hidden underneath the school. The students try to take the bomb as they believe it is a magic love granting item.
Mahoro and Minawa decorate the house for a Christmas party that Suguru is going to throw.
Now that is is New Years the group goes to the shrine for good luck.
Suguru wants to participate in the annual fighting festival but Mahoro is against this idea. Suguru sneaks out of the house to go participate so Mahoro and Minawa go out to find him.
Suguru's grandfather comes for a visit as he has been worried about his grandson. He sees that he is being well taken care of.
It is now Valentines Day and everyone is busy making their valentines and passing out chocolate candy. Mahoro teaches Minawa how to make the chocolate candy and tells her she has to give it to someone special.
An evil android shows up and tells Minawa that she is to take Suguru hostage. Mahoro finds out from Slash what has happened and she goes to the lab to find Suguru.
After everyone has been rescued they are taken to Vesper where they tell Suguru everything. Mahoro begins to realize how attached she is to Suguru and her life with him and their friends that she can not bear the thought of leaving them.
Mahoro has to fight for her life and for the first time she is afraid of the future and even of death.
Yuuichiro plans to attend the party held by the Keepers. Mahoro and Suguru escape to Bolivia but have been followed by Feldrance. Mahoro is forced to use her ultimate weapon as her strength is decreasing.
After Mahoro leaves, Suguru joins Vesper and becomes an assassin to kill androids. After getting drunk one day, he meets a girl that reminds him of Mahoro.
Mahoro decides to fight with Management in order to get Suguru's stack of dirty books. Mahoro will round up all the girls and Suguru will round up all the boys so that they can protect his supply of dirty books.