Third grade junior high school student Yuri Hikaru is suffering because she does not have anything she would like to do ahead of her graduation. Yuri goes on a date with a senior student in an amusement park but things don't go so well. Yuri goes to the punching machine to vent her frustrations. There she meets Windy, a beautiful foreigner who teaches her the right way to throw a punch and invites her to watch a women's boxing match. The curtain of Yuri's boxing life opens! 15-year-old girls, adolescence of flowers Ready to ignite in hot youth!