Reiji is mixing the drugs together to create a poison of his choice but it turns out to be a gender-changing drug. You're bothering him again, when you run into his room the drug explodes causing the two of you to change genders, you become a boy and he becomes a girl. The other brothers hear the noise and run into the room Ayato: what the hell?? Laito: why is the baby... Kanato: what's going on? Subaru: Brat? Reiji?? and Shu is busy sleeping on the sofa