You are utterly clueless about BDSM. Tobito enjoyed the pain. It wasn't working because Masumi wanted a "normal" relationship and "normal" sex is unfulfilling to a person who has severe masochistic tendencies. I speak from intimate experience. I can't have "sweet" or "normal" sex. There is no turn on. Tobito is the same. Even though Masumi was turned on by the "rough" play he wanted to deny it and be "normal". Tobito recognized this and gave Masumi an out. Most people assume that the "violence" in BDSM is devoid of love, but nothing could be further from the truth. If your lover likes a foot massage and you give them one to the best of your ability, that is showing your love. For am M, they like pain - giving them what they enjoy to the best of your ability is also showing your love. There is so much more trust in a BDSM relationship than a "normal" one. In normal sex your life is not left entirely in the hands of your lover. The bond is very different.
I thought bdsm wasn't so much about drawing blood but more... I dunno... clamps and leather whips.... Like... I know theres different kinds but I felt like some things were abuse. Like smacking him and causing him to bleed was a little cringe worthy for me. The foot was okay . And I'm sorry but did anyone else notice how he just flung the butt plug away X'D. I hope no kid or dog finds that lmao. In fact I hope no one finds that XDDDDD