Maki Hojo married a man with a child from a previous relationship and built a family life, but her sex life with her husband left her unsatisfied, causing her daily frustration from unmet desires. She soon set her sights on her stepson Ryota, a gentle and defenseless young man. From that point on, Maki began treating him as her sexual target, indulging in teasing and seducing the innocent and tender-hearted boy. In the process, she began chasing new forms of pleasure.