Osananajimi Kanojo no Morahara ga Hidoi n de Zetsuen Sengen Shite Yatta: Jibun Rashiku Ikiru Koto ni Shitara, Naze ka Tonari no Seki no Kakure Bishoujo kara Kokuhaku Sareta

Having your childhood best friend also be your girlfriend sounds like the stuff of dreams—until the dream becomes a waking nightmare. For this protagonist, that idealized romance has curdled into a daily ordeal of relentless verbal abuse. Each day, the person who should be his closest ally instead becomes his sharpest critic, systematically shredding his self-worth with cutting remarks that leave him emotionally frayed. What should have been a relationship built on mutual care has devolved into a toxic cycle that chips away at his sanity one insult at a time, transforming what once felt like fortune into an unbearable burden. Reaching his absolute limit, he arrives at a grim but necessary conclusion: endurance is no longer a virtue, but a slow form of self-destruction. The only path to preserving whatever remains of his mental health lies in severing ties completely, despite the history and familiarity that bind them. With a heavy heart and a resolute mind, he steels himself to declare their relationship over. This is not a rash impulse born from a single argument, but a measured decision drawn from countless days of suffering. And so, with that solemn declaration, the painful, pivotal chapter of his life begins—the story of a breakup set in motion by the very person who once meant everything to him.