Shounen ga Otona ni Natta Natsu

Ryuki Kirishima lost his parents in a tragic car accident at a young age and now lives together with his elder sister, Reiko, whom he deeply admires as the most wonderful person in the world. Ryuki frequently visits a secluded warehouse that serves as his secret hideout, where he watches videos of “Kiril-sama”—a mega-popular adult star generating huge buzz across online platforms. Boasting voluptuous breasts, a narrow waist, and irresistible curves, Kiril is the only adult model who has ever managed to ignite Ryuki’s hidden desires.

One day, driven into a state of intense arousal while watching her content, Ryuki runs into the nearby forest to clear his head. To his utter disbelief, he stumbles upon none other than Kiril herself standing right before his eyes, marking the beginning of a life-changing summer.