MINNA NO KISS CLUB

Mochida, a junior high boy, had a crush on Aoyama, the most beautiful girl in his class. However, while he was secretly masturbating in the library thinking of her, he was caught by Hira, the library committee member on duty. Caught red-handed, Hira suddenly demanded a kiss from Mochida. Before he could react, Mochida lips were touching hers and it caused him to ejaculate. She invited him to join the secret “Kissing Club.” A story about the debauchery of their youth, as they become obsessed with the forbidden fruit. (Source: Yanmaga, translated) — Description from AniList community (anilist.co).