Izumi, who has an unlucky constitution, always encounters bad luck. During the high school entrance examination, he was able to get back his admission ticket that was blown onto a tree by the wind with the help of the strong woman Shikimoro, and was admitted to high school. Izumi has always wanted to thank her in person, but he didn't expect that they would end up attending the same high school and become boyfriend and girlfriend. In Izumi's eyes, Shikimoro is a perfect girlfriend who always helps him out in times of crisis, but he didn't expect that she still has weaknesses. The love comedy story of the two unfolds on the high school campus.