Love Is Indivisible by Twins

(https://hikka.io/characters/jun-shirosaki-aab7a2 "Jun Shirasaki") and the Jinguuji sisters are childhood friends and neighbors. When (https://hikka.io/characters/jun-shirosaki-aab7a2 "Jun's") first girlfriend, the older sister (https://hikka.io/characters/rumi-9c3d8a "Ryuumi"), breaks up with him, she says something that complicates the three people's relationship, their first loves, and their romance—? \Written