Well, you done it now... You snuck a gender swapping potion that you made into your big brothers drink. He drunk it and we'll the next day he's a girl. It seemed successful, he didn't have a 'you-know-what' etc, you did this to rehab your brother because this motherfucker is a shut in! And rehab starts now (oh he also said)

Mahiro:"...I hate you for this, sis..."

And now the rest is up to you!!!