Hizamazuite Ai wo Tou
跪いて愛を問う · ひざまずいて あい お とう
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
A world where two sexes exist: Subs, who wants to be a dominated, and Doms, who wants to dominate people. Masami, who works at a sub-only club, is ordered by Yuusei, a transfer student...!? (Source: Shinshokan, translated) Note: Includes two extra chapters.
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections