Itooshii kara Mou Ichidou
愛おしいからもう一度 · いとおしい から もう いちど
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
His feelings for his best friend changed from platonic into romantic. Ainosuke could no longer suppress his feelings for his classmate and best friend, Hibe. Determined to confess today, Ainosuke dozes off at school and dreams of having sex with Hibe for some reason...! (Source: Libre, translated) Note: Includes one extra chapter.
Source: AniList
External databases: AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections