Youkai na Hana-kun wa Kansatsu sareteiru.
妖怪な花くんは観察されている。 · ようかいな はなくん わ かんさつ されている 。
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
2nd-grade class 1 student Yamashiro Hana has no friends. His only friend is a flowerpot that sits on his desk. I have been assigned the task of keeping a daily journal of Hana-kun, who is such a mysterious being. I'm going to observe the cute Hana-kun until I can't take my eyes off of him! (Source: Libre, translated) Note: Includes 13 extra chapters.
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections