Katsuragi Sento is a 17-year-old student who is very popular in his class. He has an extroverted and narcissistic personality, and he often flirts with the girls around him. Katsuragi is not only intelligent but also physically strong. Despite his reputation as a flirt, there is one woman who has captured his heart. Katsuragi is determined not to let her go easily and is resolved to win her affection.