My Ribdiculous Reincarnation

"Protagonist 'I' is trapped in an endless cycle of reincarnation. The story unfolds in a world where souls can choose their next form-but popular roles like 'Demon King' or 'Hero with Cheat Skills and a Harem' have a 50,000-year waiting list thanks to a recent surge in demand. Frustrated by the wait, the protagonist opts for rapid-fire rebirths into increasingly bizarre forms. These range from the rib of a harem-leading hero to a hermit crab, a vegetable, and even an explosive designed to obliterate disgustingly happy couples."