Huh, hardly anyone seems to be discussing what's happening in the series. I would've expected this one to get a lot of discussion.
Well, if anyone does read this I have a question. Why hasn't Shogo-san tried talking to Yuzurina-san about Lyrical Sisters? After all, that shop is supposed to be run by his imouto's closest friend, so if Yuzurina-san truly is his imouto she should know about the store and possibly have some opinions to state. I have a suspicion that those lab results were faked, not to mention that Yuzurina-san doesn't act the slightest bit like what little we've heard from the one who claims to be his imouto's closest friend not to mention that those two hardly seem to interact, which doesn't lend much credence to Yuzurina-san's claims in my opinion. Of course, I'm a naturally more suspicious person than most in that type of situation, but even without those two extra scenes that Shogo-san wasn't a part of I still find it rather unconvincing, and I do know that if someone has access to sufficient wealth/power those lab results could be rather easily faked, which becomes even easier to do when the test is done in secrecy. Also, there seems to be to severe of an implied age difference between Yuzurina-san and the owner of Lyrical Sisters for it to be easily believable that they were introduced as children and became fast friends.
Actually, does anyone have any guesses as to whether or not the true imouto has been introduced, and if so who she is? I will state my guess. I can't seem to remember names worth anything anymore, but the 'undercover' gal is actually the one I'm most suspicious of, although the one gal's sudden protectiveness of Miyabi-san is certainly cause for concern, especially since Miyabi-san and Shogo-san suddenly stopped being able to see each other shortly after the pretend wedding when they were younger, but Miyabi-san and that girl didn't seem to interact much before Shogo-san was on the scene and it is certainly possible that they've become friends since the start of the series.