After the graduation ceremony... A gift from your stepmother to you now that you're an adult. Mika Sumikawa

The story revolves around a stepmother, Mika Sumikawa, who gives her stepson a unique 'gift' after his graduation ceremony. As they spend more time together, their relationship evolves into a romantic and intimate one, exploring themes of forbidden love and familial bonds. The central dramatic tension lies in the societal taboo of their relationship, making their interactions both passionate and secretive.