Quote from akari_mizunashi

Well, pretty much every one of Yoshihara Yuki's heroines are virgins, and I don't think any of her smut is rape. But loss of virignity isn't dwelled upon in many of them. Aisuru Hito comes to mind...

Itadakimasu's and Mermaid Prince's heroines are not virgins. I don't know about the others. So you could just avoid the two. 🤣

These also deal with losing virginity:
Baby Leaf
Zig Zag Don