The 2nd button on male uniform is over the heart and is supposed to be given to the girl he loves to confess his feelings.
Meanwhile, Keita gets into all sorts of trouble trying to keep the other boys from spying on the girls.
The series revolves around a boy named Keita Suminoe who finds himself the centre of attention of his twin step-sisters, Ako and Riko.
The Ending Theme shows Keita welcomed by Juniors on his first day.
Finally he decides to lick her neck and smell her body as he has a body odour fetish.
Whilst looking up on good luck charms to help Keita with his studies, Ako and Riko learn of one that is made using pubic hairs.
But a few incidents involving paraders enables Ako and Riko to indeed spend some time with Keita alone.
At home Suminoe Family enjoys dinner.