Kare no Shiranai Himitsu wo Irete.

“Tell him a secret he doesn’t know.” It had been two months since they started dating, but Yui and Naoya still weren’t used to being a couple. Just then, a man passing by called out to them. “Yui-chan?” In that instant, Yui was speechless. Standing there was the man she’d lost her virginity to. Before they started dating, driven by curiosity about sex, Yui had slept with him. Now, the man threatens to expose her past to her boyfriend. And once again, the secrets Yui can’t tell her boyfriend begin to pile up inside her…

(Source: Fanza, translated)

Note: A live-action AV adaptation (MUDR-279) was released on October 11th, 2024.