Sora from Kingdom Hearts and Ben from Ben10 find themselves captive inside a twisted facility that's attempting to break their minds!
The art on the front of the book is by the commissioner, daisuke090.

You can view the (extremely NSFW!) version on Pixiv: www.pixiv.net/en/artworks/8818…

Part 3 was automatically taken down, but you can view it in the above link.

https://www.deviantart.com/gophertickle/art/Sora-and-Ben-Reconditioned-P4-872067442