People who know the bluishness of the sky (1-4 volumes of volume)

Publisher: KADOKAWA/Kadokawa Bookstore
Author: Super Peace Busters, Yaeko Ninagawa
Size: 128mm x 182mm
Number of books: 4
Language: Japanese
Category: Youth manga, manga
Latest publication date: 2021-03-25

Synopsis:
Aoi Aio, a 17 -year -old high school student who plays his favorite bass and sends his daily life without studying for the exam. "Shinno" suddenly appeared before such Aoi. He appeared in the same form as 13 years ago, with Aoi's sister, Akane's former lover, Shinnosuke!?