天野平虽是不折不扣的男生，却拥有一副人见人爱的可爱面庞和娇小玲珑的袖珍身材，为此，一直以来暗恋着同学雏姬的他十分苦恼，自卑异常。听说运动能够助长身高，天野平找到了自己青梅竹马的好友日下万里，请求他帮助自己加入篮球部。完全不适合篮球运动的天野平在部里吃了不少的苦头，本想就此放弃的他却因为看到了雏姬为球队留下的感动的泪水而坚定了继续奋斗的信念。一次偶然中，名叫鹰丘虎雄的男生遇见了身着女装的天野平，不明真相的他对眼前这个漂亮“姑娘”一见钟情，之后展开了热情的攻势。充满了欢笑与泪水的校园喜剧正在上演着。

Amano Hei is a third grade boy in junior high who is short and looks like a girl at first glance. Ongoing with the story, he is involed in a love triangle with Sagami Makoto and Ichinose Hinaki. With his best friend Kusaka Banri, a popular guy in school, they go through worries of love and adventures together.