はるかぜの鼓動

"They say the second button of a school uniform is meant for the person closest to your heart..." Those were the words Hozumi used to suddenly confess his feelings to Shuutarou, the five-years-younger boy he fell in love with at first sight, on his high school graduation day. Though it remains a bittersweet memory, Hozumi spends his days struggling to let go of his feelings for Shuutarou, someone he believed he would never see again. Then one day, Shuutarou appears at the high school where Hozumi works, this time as a student teacher...!? (Source: Kodansha, translated) Note: Includes two extra chapters.