In Order to be Beside You
君の隣りに在るために · きみ の となり に ある ために
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Kon and Waki were best friends, before Kon's confession drove Waki to avoid him. Separated when they entered different high schools, Waki hopes things can go back to how they were before. Why, then, is he so upset to see Kon being friendly with a cute girl? Normal best friends wouldn't be like that... would they? (Source: DMG)
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections