Summary
Shounen ga Otona ni Natta Natsu (Boy grow up in summer) is an 2023 Hentai manga by Jairou, first released in between 2022 and 2023 on adult magazine Comic MILF.
Kirishima Ryuuki is a young football prodigy living on his own since his parent died and her beloved older sister Reiko, a chemical genius who practically raised him, moved to Tokyo for work. Ryuuki has never shown interest in any girl (except perhaps his sister), until his friends introduce him to a new porn actress, Kirill-sama, by whom he is immediately smitten. What a coincidence then that Kirill happens to pass around those parts when the boy is busy watching one of her videos…
A 4-episode animated adaptation produced by Queen Bee started releasing in September 2024.