僕の彼女がマジメ過ぎる処女ビッチな件 = My girlfriend is faithful virgin bitch
ぼく の かのじょ が まじめすぎる しょじょ びっち な けん
est. Rough estimate based on volume count, reprints and magazine — not an official figure
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections