Ai Hoshina, a 20-year-old female college student living in Ota Ward, Tokyo. She has had only one sexual experience with just one partner—essentially inexperienced. Although she has many male friends, relationships never progress beyond friendship. Describing herself as cute but shy, she admits she's single and lacks the courage to confess her feelings even if she likes someone. Her situation closely mirrors that of a virgin guy. Both, seeking to change their past selves, take on the challenge of losing their virginity together.