Ordinary university student Kanade is a Beta. He harbors feelings for his neighbor and childhood friend Munechika. However, in this world, the typical trend is for an Alpha and Omega – or 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…