The Dungeon Bosses Are My Pets

One hundred years in Hell. Lee Ji-hoon, a human who had been worked to the bone as the manager of the monster farm Hell Farm. After barely managing to return to Earth, he became an F-rank hunter. But then—Aren’t all these dungeon bosses the kids I raised? [You have successfully tamed an S-rank boss monster.] Well, I guess I’ll just raise them again. Using every bit of experience I gained from a hundred years in Hell!