The man Koharu loved wasn't cheating on her...he was cheating on his wife with her! And not only that...he was the third guy in a row to do so. Dejected, she leaves Tokyo for her hometown, and rejects a future of love and marriage for a simpler life. But

The story starts with Sanda, a second year middle school student, getting attacked with a kitchen knife by his classmate Fuyumura. While Sanda couldn't make sense of the situation at first, he gradually came to believe that Fuyumura's actions were just