GS-057-2 I'm a science student who loves experiments and erotic things, and I'm secretly making an aphrodisiac! However, I don't have the courage to try it on a girl and I can't get any results ... However, one day, as a result of a female member accidentally drinking an aphrodisiac that was about to be made ... The normally sober member changed completely! - Yumemi Yawn (Yawning Yawn, Yawn Nitta, Madoka Ogawa)