We're On Our Own From Here
この先は二人きりで · このさき わ ふたりきり で
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Haruki is a second year in high school, and is secretly in love with his best friend, Ryusuke. He swears he’s content with their relationship, but when a girl starts showing interest in Ryusuke, Haruki’s feelings spin out of control. He confesses, and to his surprise, Ryusuke responds…? (Source: Kodansha USA) Note: Includes one extra chapter.
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections