[Machine Translation] Choro-Lehman, the company stockbreeder, has completed his development! Yota, a company employee who collapsed from exhaustion on his way home from work, wakes up to find that his ass has been developed by a stranger, Akuto, a yakuza! Yota is told that he has to repay the debt as a co-signer after his classmate overdoes his 30 million debt and runs away. He tries to find another way to pay the debt, but fails... and is even saved by Akeito in a pinch. Akito, who couldn't stand to see him, takes care of him, bonds with him, and before he knows it, he is being steadily trained and developed...!