Hijiri Kaisei, an alpha, has issues getting close to omegas because he feels guilty over a traumatic incident from his past.Then one day, his senpai tricked him into going to a male omega brothel.While there, he meets Ryuji, a bitchy-maso boy, who is surprisingly different from the other omegas Kaisei met in the past.Will this encounter throw Kaisei into an even darker abyss..?!"The animal's burning desire"