The narrative centers on Ryuuki, who lives with his older sister Reiko, a brilliant chemist, following their parents' death. The story kicks off during a summer gathering where Ryuuki discovers the adult star Kiriru, to whom he feels an inexplicable and intense attraction.
: The story explores a love triangle involving the adult streamer "Kiriru" and Ryuuki's childhood friend, Chiaki. 241129 shounen ga otona ni natta natsu episod exclusive
The series is noted for blending coming-of-age elements with adult themes: The narrative centers on Ryuuki, who lives with