The show commits to the bit so hard that it actually subverts the entire harem genre instead of just coasting through it. Every girl wins because the premise forces Rentarou to love them all equally, which sounds like a fantasy until you watch the show earn it through genuine chemistry and character work that makes you believe he could actually care about each of them. The animators clearly had fun with this one, and that energy is contagious, it's trashy in the best way, crude without apologizing, and funny enough that you stop questioning the premise and just ride it.
Rentarou's romantic streak ended before it started. A hundred rejections in middle school left him convinced he'd never find love, so he prayed at a shrine for a miracle. The God of Love answered with an impossible bargain: Rentarou will meet one hundred people destined to be his girlfriends, and he must make every single one of them happy. The catch is brutal. If even one relationship fails, everyone involved dies. High school becomes a delicate balancing act between romance and survival. Rentarou juggles his growing harem with genuine care while each girlfriend demands real affection and attention. They're not interchangeable side characters,they genuinely love him, and he's determined to return that feeling equally to all of them. The series swings wildly between heartfelt romantic moments and absurd comedy as Rentarou navigates the mathematical nightmare of dating a hundred people. It's romantic fantasy meets chaotic harem chaos, where supernatural stakes meet slice-of-life hijinks and unexpected emotional depth.