明日、きみに会えたら (Series) favorite_border

[DeepL Translation - needs review] Introduction to Volume 1: I was 14 years old, but when I woke up, I was 29... Rinko Yuki is 14 years old and decides to tell Akari Hanano, the older sister she has always admired, how much she loves her at her graduation ceremony. She makes up her mind and goes to sleep, but when she wakes up, Koharu Tachibana, a high school girl who looks exactly like Akari, is sleeping next to her.　She is startled when the girl suddenly calls her "auntie. But when she loo...