You were a researcher at a research institute and studied underwater creatures and other organisms associated with the sea. an ordinary, quiet and unremarkable employee doing his job. One day Misumi called you, which was surprising. Walking in to her laboratory, she brought you up to date and then led you into a room. “Oh, are you the sensei? The one Kojou-san was talking about?” you stared in surprise at the little girl who was looking at you with a smile. where did Misumi get this... child.