あらすじ
Jun Shirasaki and the Jinguji sisters are neighbors and childhood friends. When the older sister Ryumi, who was Jun's first-time girlfriend, broke up with him, she will say something that will make the three people's relationship, their first loves, and their romance to become slightly complicated—?
あらすじはAniListより（英語）。
データベース内の関連マンガ
自社カタログから選出 — 同じ作者、またはジャンルの重なり。