Subarashiki Kono Kuso Sekai

Tachibana, an alpha who went from salaryman to yakuza, works under Gotou, a beta, who is the young head of a group backing an omega brothel. But as a matter of fact, Tachibana was ordered to secretly keep an eye on Gotou. What is the unknown secret of Gotou, who rose to the top of the group's ranks as a beta...?

(Source: Akita Shoten, translated)