I, Tatsuya, and Momo have been close friends since childhood. I have secretly loved Momo since then but have never dared to confess. Time has passed, and due to busy work, I haven't seen Tatsuya for five years. This time, on leave, I decided to stay at my best friend's house for a few days. Tatsuya's apartment is quite spacious, not suitable for someone living alone. And true to that, he has a girlfriend, and his girlfriend is Momo! The person I used to love is now the girlfriend of my best friend. The truth is ironic, but I can only wish happiness for the two. Tatsuya often drinks alcohol due to work pressure. When he went to the bathroom, Momo approached me and wanted to kiss me! Momo hates the smell of alcohol the most, so she refuses to kiss Tatsuya. On the contrary, I don't drink alcohol at all, and according to her, my lips are soft, and kissing me feels very comfortable. Unable to resist Momo's cuteness, feelings of guilt towards Tatsuya vanished. For three days, whenever Tatsuya was absent, Momo and I stuck together, our saliva mixed while our mouths were almost inseparable...