Watched without reading much except the short summary.

But men that was hardcore.
Sow this only in Mangas never in a movie. Loved the sex scenes as they were not porn per say. With enough exposed sides but hidden parts as well so it was not as nasty. Not a fun of porn at all.
The BDSM was not light but not hard , somewhere in the middle.
This thing about “pleasure changes the mind and body” i think its true. So Makoto getting hooked on pleasure even if he is not into men and in that situation it truly can happen. Specifically in the state of mind and psychy he was then.
The Doc (sorry bad at names didnt remeber his) you can see from a point that he is a little unstable as well - then we know why. He is saying to Makoto its not his fault but truly he is saying to himself.

Now on the overall i was amazed and will watch maybe again later. Also im a sucker for HE even it there is a bad start or angst (prefer none) or sad things. Man i would have really enjoyed if there was more after the Beach House Sex - but as this is more of an Smut BDSM Artistic Movie 😭🤣 then it has to end with
- Are you alive
- Yes i am.

Ps: I was expecting that Makoto will not let him leave and take his live.