In Episode 2 of "Shounen ga Otona ni Natta Natsu," the protagonist, Ryuki Kirishima, continues to navigate complex relationships and encounters. Following his intimate experience with the adult film actress Kiriru, Ryuki meets his friends for a swim at a nearby river. During this gathering, he attempts to boast about his liaison with Kiriru. Unexpectedly, Kiriru appears and reprimands him for not adhering to their prior agreement. As a consequence, she insists on recording an explicit video involving Ryuki's friends. Throughout this event, Ryuki experiences feelings of jealousy and frustration, which he expresses during the encounter.
This episode delves deeper into Ryuki's emotional struggles and the complexities of his relationships, highlighting themes of desire, jealousy, and the consequences of broken promises.