Alt. title: Happy ending eat shit ; ハッピーエンドくそ喰らえ 去你的 ; Happy Ending
From Lewd4Yaoi Scans: When Ume was five years old, he fell in love at first sight with his next-door neighbor, Hara-chan. From then on, 20 years has passed, and Ume has found himself becoming a sex friend of his unrequited love. However, Hara-chan’s actions and feelings towards Ume have slowly become even more confusing??
– chapter 3