Here's my Bondage list as it stands:
Sites that review(ed) hentai (as guide to the titles listed below).
- Angel Blade episode 1
- Beat Angel Escalayer episode 2
- Behind Closed Doors
- Bible Black: New Testament episodes 1 and 2
- Black Widow
- Blood Royale
- Cambrian
- Cool Devices
- Ep. 1 "Curious Fruit"
- Ep. 3a "Lover Doll"
- Dark Chapel
- Dark Love episodes 1 and 2
- Do You Know the MILFing Man? episode 2
- End of Summer episode 3
- Enspelled episode 2
- Flower and Snake The Animation
- Guy episode 1 ("Awakening of the Devil")
- Hyakki: The Secret of Devil's Island
- Inmu 2
- Ep. 1a "First Night: Illusion" (in a fantasy/day dream)
- Ep. 1b "Second Night: Excessive Love"
- Ep. 2a "Third Night: The Shadow Card"
- It's a Family Affair episodes 2a, 2d
- Lesbian Ward episodes 1 and 2
- Maison Plaisir episodes 1 and 2
- Medical Humiliation
- Mystery of the Necronomicon episode 3
- Night Shift Nurses Experiment
- Princess 69
- Professor Pain
- Punishment episode 2
- Renzu: The Distance Between The Two
- Sex Taxi (all)
- Shusaku episode 1
- Sins of the Flesh (on The Best of Kitty Volume 4) (light)
- Slaves to Passion
- Snow Night Stories (all; episode 1 has only one shot)
- Spy of Darkness
- Variable Geo Neo episodes 1 and 2
- Vixens / Visionary episode 3
Region 2:
- Ail Maniax
- Bondage Game
- Pidgeon Blood
This list may not be definitive (though I hope to make it so with your help); what did I miss, and what needs correction?
See the links in my .sig for more lists.