Koi wa Futago de Warikirenai(2022)

Koi wa Futago de Warikirenai

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—?

(Source: ComicWalker, translated)