Oji-san ga Onnanoko ni TS Shitara Yuri Shoujo to Nakayoku Naremashita

A middle-aged man, a dull and lonely masturbator, uses the girl next door as his sole source of material for his daily habits. His life takes an unexpected turn when he is suddenly transformed into a cute young girl. The cause may be his friend, a genius scientist he connected with on social media, who seems to have orchestrated the change. Now inhabiting a female body, he discovers that girls naturally get along with each other, opening the door to new and intimate relationships. The erotic and lewd developments unfold rapidly as he navigates this new form and the attention it brings from the girl next door, leading to a series of provocative encounters that blur the lines between his old identity and his new reality.