Shounen Ga Otona Ni Natta Natsu Ep 1 !!top!! May 2026

Ryuuki’s older sister. Though she is a chemical genius, she is portrayed as a "genius slob"—brilliant at her work but messy and plain at home.

(The Summer the Boy Became an Adult) marks the debut of a 4-episode animated series based on the 2023 manga by Jairou. Released in September 2024 by Queen Bee , the first episode introduces a story that blends a standard coming-of-age narrative with adult themes, centered on the life of a young student named Ryuuki Kirishima. Plot Overview: A Summer of Awakening shounen ga otona ni natta natsu ep 1

The premiere episode establishes Ryuuki’s home life and his unique relationship with his older sister, Reiko. Following the tragic death of their parents, Reiko—a brilliant but unkempt chemical genius—raised Ryuuki single-handedly. Ryuuki holds her in the highest regard, seeing her as both a sister and a mother figure. Ryuuki’s older sister

Ryuuki’s childhood friend who harbors a secret crush on him, adding a layer of romantic tension to the story. Production and Themes Released in September 2024 by Queen Bee ,