カプセル姦 : 正義のヒロイン雌堕ち実験!
かぷせるかん : せいぎ の ひろいん めすおち じっけん
est. Rough estimate based on volume count, reprints and magazine — not an official figure
External databases: MADB
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections