Gal no Gyaku Rape wa Gyakuten Dekinai!

One day, the protagonist, who is short, a virgin, and has no girlfriend, is reunited with his childhood friend, Serena, who has become a gal. While rejoicing at the unexpected reunion, the protagonist is doused with a love potion he had made himself in order to get rid of his virginity! On his way home, he gets tangled up with Serena again, but the mote medicine he smells on her suddenly makes her go into heat and......!

(Source: Mujin Comics, translated)

Note: Published in Comic Mugen Tensei 2023-05, 2024-01, 09, 2025-04, 07.