Yoshikawa is a student of a university. She is good at social science and participates in swimming department. Curious about the opposite sex, but not having sex yet. I usually say hello to my male classmates, but I haven’t tasted the taste of love. After the end of the evening club activities, the habit is to take a bath and wash thoroughly to get rid of the stench of disinfectant water before changing clothes to go home. On her way home, she suddenly heard an unfamiliar cell phone ring. Music from my schoolbag is not from my mobile phone.