僕は七度目の人生で、怪物姫を手に入れた = I GOT A MONSTER PRINCESS IN MY SEVENTH LIFE
ぼく わ ななどめ の じんせい で かいぶつひめ お て に いれた
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