Shounen ga Otona ni Natta Natsu – Episode 4

Ryuki Kirishima has lived a life shadowed by tragedy, having lost his parents at a young age in a devastating accident. His only remaining family—and the person he respects and loves above all others—is his older sister, Reiko. To Ryuki, Reiko is the definition of the perfect woman: graceful, hardworking, and pure.

However, young Ryuki harbors a secret of his own. In his “secret base”—a secluded, old warehouse—he frequently watches the videos of “Kiril-sama” a viral sensation taking the adult world by storm. Kiril possesses a lethal physique: an explosive bust, a tiny waist, and provocative curves that defy reality. Ryuki, who has never felt a spark for traditional adult media, finds himself inexplicably drawn to Kiril with an intensity that borders on obsession.

One afternoon, unable to contain his excitement after a new video release, Ryuki rushes into a deserted patch of woods to clear his head. There, amidst the trees, his heart stops. He catches sight of a familiar figure—the living, breathing embodiment of “Kiril-sama” standing right before his eyes.

But as the mask begins to slip, the truth is more shocking than any fantasy. How will Ryuki react when he realizes the hidden connection between the world’s hottest idol and his own dignified older sister?