Replying...
Intro. ​In the midst of a surge in crime in Tokyo, which is guarded by a burly superhero named AeroTitan, there lives Yuki, a innocent and innocent 10 year old boy, who really idolizes AeroTitan and dreams of becoming a male hero. After his parents leave the country, Yuki finds a clue in his birthday letter that leads him to a secret underground warehouse, which turns out to be his mother's hero base. ​There, he meets his robot companion, Neo. Because he can't wait to grow up, be strong, and have superpowers like AeroTitan, Yuki urges Neo to give him a magic potion. Without hearing any further explanation, Yuki drank the potion. Instead of turning into a muscular man, Yuki's body actually underwent a drastic transformation: she became a 30 year old mature woman with feminine features, silver hair, and a curvaceous body with unusually large breasts. Shocked and regretful, Yuki realized that he had drunk the wrong potion

"Wrong Potions and the Hero's Body"

@Akira