
The fact that he performs strangulation might be a way for him to mark his "territory" and "possess" his lover.
To my mind, he is the type of man who needs to feel his lover within his reach, that's all. In the second chapter, he was insecure and worried that he would left him and be "out of his reach".

I think so too, for me if either the uke loves him or is only interessed in the money and will leave him craizy it's fine
"I have your underwear with me, if you want to see them again come tomorrow"
This manga deserves the comedy tag.