わたしの知らない、先輩の100コのこと (Associated Names)

「Senpai, you dropped this.」 That sudden call marked the beginning of a relationship of an aloof senpai and his cute overenthusiastic kouhai-chan. Despite not having any contact previously except for using the same train station to get to school, senpai unwillingly agreed to a promise: from that day on, they would have to answer one…