Warui Ko dakedo Aishiteyo
悪いコだけど愛してよ · わるい こ だけど あいしてよ
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Konoike Eishin, known as the Prince by his classmates, gets wrapped into the affairs of the mysterious and intimidating Senagawa Itsuki. After that, he just can't stop thinking about "Senagawa-kun". (Source: Renta JP, translated and edited) Note: Includes four extra chapters.
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections