Kimi ni Sukitte Iwasetai
君に好きっていわせたい · きみ に すき って いわせたい
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Kei and Misaki have been best friends since they were kids. One day, Misaki confesses her feelings for Kei and the two of them start going out. To Kei, everything seems to be going alright but to Misaki...
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections