Synopsis
"Senpai, I'll dominate you to the marrow of your bones."
Sumio Tachibana, an orthopedic surgeon (a resident), has spent his days as a Sub controlling his desires to be dominated and controlled. However, he doesn't have a designated Dom, and remaining in this state will damage him both mentally and physically. Because of this, Sumio decides to visit a Sub-only club... There he meets his old high school kouhai, now a yakuza, Itsumi Wanizuka (Dom). Since he doesn't have a designated Dom, Itsumi urges, "Let me become senpai's dom." A trying story of a jealous young yakuza and a surgeon who really just wants to be spoiled?!
(Source: Media Soft, translated)