High school students Kawakami Fuku and Tsukishima Takara intertwined the love in their hearts for the first time.

Soon, something unexpected happened to the two people in love...

Kawakami Fuku is a very ordinary high school student.He lives a happy school life with Nozomi Yazawa, who is both his roommate and good friend, and Tomohiro Iida, who has a crush on Yazawa. At the same time, he has been dating Tsukishima Takara, who attends another high school, since middle school.So far, Bao has achieved excellent results in many track and field competitions. He is a serious and kind-hearted young man who cherishes his mother Naomi who single-handedly raised him.He cherishes Fu from the bottom of his heart, and is trusted by Fu's mother Qingmei to the extent that he would be relieved if he were Baojun.

The day before the summer vacation for the first year of high school, Fu told his mother that he would be back late because he and Bao were going to a local fireworks display.Talking to Baojun... The relieved Harumi smiled and handed the pocket money for two people to her daughter who was dating her boyfriend. After school, Fuku went to Bao's house with her guilt for her mother. It was Naomi, the nurse.Bao's home where the night shift is away.Fuhebao had already decided to have sex for the first time on this day.

Since that day, the two of them had overlapped their bodies several times while taking birth control, but in the spring of their second year in high school, I later noticed that the contraceptive was broken...