平凡な大学生の奏はβ性。家が隣で幼馴染の宗近に密かに思いを寄せていた。しかし世間的に、αはΩで、βはβ同士でカップルになるのは一般的。そのため、α性の宗近と自分は釣り合わないと思い、気持ちを隠して友達として接していた。しかしある日、奏は自分の体に妙な違和感を感じて――…？

Ordinary university student Kanade is a Beta. He secretly holds feelings for his neighbor and childhood friend Munechika. However, in this world, the typical trend is for an alpha and omega, and two betas to pair up. Because of that, Kanade thinks he’s not a match for Munechika who’s an Alpha, and stays with him as a friend. However, one day, Kanade feels a weird discomfort in his body…