Danshi Koukousei wa Kyou mo Onaka ga Suiteiru
男子高校生は今日もお腹がすいている · だんし こうこうせい わ きょう も おなか が すいて いる
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
High school boys are pretty active, whether at school or during their leisure time, so it's no wonder they're always hungry! And what better way to deal with it than to learn how to cook for themselves so they can eat whatever they want, whenever they want?
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections