Shinya Fulfills Childhood Pledge with Akane and Sayumi’s Guidance

Akane, a transfer student and the engaged bride of Shinya’s elder brother, reconnects with childhood promises as feelings between them resurface. Sayumi, engaged to Shinya’s other brother, guides him in the art of intimacy. Empowered by her teachings, Shinya shares tender moments with Akane, fulfilling their long-held bond.