The Elder Sister-Like One, Vol. 5 — Iida Pochi.

Haru is a beloved mainstay of the local shopping district, a second “big sister” to Yuu, and a friendly (?) acquaintance for Chiyo. But what relation does she have to Yuu's uncle…and why does Yuu have faint memories of knowing someone just like her? The bonds of blood and affection run deep, and the truth about everyone's shared past reveals the tragic consequences of forbidden connections…