Fuuko Kameyama was a cheerful, ordinary girl, who was about to embark on the time of her life - entering high school. However, one day, a truck pulls up to her low-rise appartment. Emerging from the truck were two handsome boys that were her age. One was the fun-loving Daiya, the other was the cold and sly looking Ichi. Apparently these cousins were moving into the appartment above her's and they will be attending the same high school in the same grade!

壱にもらった誕生日プレゼントが、伊織さんの選んだものだと知り傷ついた風呼。伊織さんと壱との関係に、不安でいっぱいになり打ちのめされてしまう。そんな風呼を気遣う大也は…!?