Ookina Noichi to Chiisana Hinayuki
大きなノイチと小さなヒナユキ · おおきな のいち と ちいさな ひなゆき
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Tanda Nao is filled with concern because his cherished childhood friend Hinayuki has been hanging around with a classmate he doesn't trust: Noichi. Hinayuki is petite, delicate, and docile, while Noichi is big, quiet, and rough... Nao is worried because he doesn't know why they are together!? Could it be that these two are in some kind of relationship...!?
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections