Natsume-kun wa Nan Demo Shitteru
なつめくんはなんでもしってる · なつめくん わ なんでも しってる
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Yousuke and Natsume are childhood friends. Yousuke assumes it's natural that Natsume would know a lot about him, seeing as they've lived next door to each other for years, but one day, he discovers a secret...
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections