Kiyoko Yoshida is president of her school class in which she sits next to Tsuyoshi Yano, who turns up every day covered in bruises. Wondering about Tsuyoshi's predicament, Yoshida follows him to find out Yano is clumsy and accident-prone. Yano thanks her for worrying about him, flustering Yoshida and leading her to realise she has a crush on him. From there every school day Kiyoko comes prepared with a medical kit to treat Tsuyoshi’s bruises and strengthen there relationship both as friends, but as lovers too.

(Source: Wikipedia)