One day Yuu, a second year high school student, meets his classmate’s older brother Maya. Being an only child, Yuu has always idolized the thought of an older brother. However Maya, who’s selfish and likes to pick on Yuu, is completely different than anything he’s ever imagined; saying things like, "you really are cute," and kissing him all of a sudden?!

Also contains the story of Shingo, Maya’s younger brother, and extra stories.