Prologue

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Thunderclaps: Four Angels Trapped in a Sexual Prison (サンダークラップス！淫獄の四天使)

Author: Hazawa Kouichi (羽沢向一)

Illustrator: Kawagishi Keitarou (カワギシケイタロウ)

Label: 2D Dream Novels (二次元ドリームノベルズ)

Release Date: 7/20/2000

This series is what you get when a Japanese lover of American comics decides to create his own superhero story but it's also porn. It's about a four-woman superhero group called the Thunderclaps in a world full of superpowered people called Offbeats. The original trilogy is pretty old, but it's had some shorter digital-only stories released in recent years.

Be warned: it contains a lot of sexual assault and it gets into some weird stuff over the course of the series.