Scenes from Spanish film Slam (2003).
Full movie is available on YT (age restricted):
Youtube Video
Timestamps: 1:22:45-51, 1:23:07-45
More scenes: 1:06:07-39, 1:13:05-10, 1:28:29-47
They aren't full-on sex scenes unfortunately.
Chained guy is Catalan actor Octavi Pujades.
This is "Bon" from PrivateBoyMovie:
https://www.privateboymovie.com/asian/tag/bon/
There's a 174 photoset and a single 33 min video.
Photo set preview link (first 35 pics):
https://www.privateboymovie.com/preview/bon/index.htm#27
For the vid, there's a torrent available:
https://www.gaytorrent.ru/details.php?id=2c2334229d0dec5392c190a38e48b4e42cdb62c876d3e05427d810d62167f5ba