En mo Takenawa
縁もたけなわ · えん も たけなわ
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Tetsuo and Chisato have been friends since childhood. After graduating from high school, they went their separate ways, but their presence in each other's lives was always a source of support. Until the day came for them to end their relationship… (Source: Feelweb, translated) Note: Chapter count includes one volume-bonus chapter.
Source: AniList
External databases: AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections