A supernatural forced-proximity setup that doesn't waste time pretending anyone has a choice. Seiji gets dragged into romantic chaos not because he wanted it, but because an angel literally dies if he doesn't kiss someone, and that absurd desperation is the joke. The Kiss Note removes every excuse for hesitation, there is no "will they, won't they," only "how catastrophically will this go wrong and who gets caught in it."
Seiji's ordinary high school life explodes when an angel named Guri crashes into his world with a problem: she's accidentally written his name into a Kiss Note, a supernatural notebook that forces two people to fall in love if they kiss. The catch is brutal. Unless Seiji locks lips with someone soon, Guri dies. Panic-stricken, he agrees to kiss his longtime crush, Akane, the school's picture-perfect girl. What he doesn't know is that Akane harbors feelings for him so intense they border on unhinged obsession. Once they become a couple, Seiji thinks his crisis is over. He's wrong. Guri develops genuine feelings for him too, creating a love triangle where he's caught between a possessive girlfriend and a jealous angel who literally controls destiny. What should be every teenage boy's fantasy becomes his personal nightmare as he desperately searches for any escape from romantic chaos. This is comedy filtered through absolute mayhem: slapstick chaos, ecchi humor, and characters whose obsessions spiral into genuinely unpredictable situations. Seiji just wanted normalcy. Instead, he gets madness.