Looking for hmanga where dominant bf does some nasty stuff

The manga takes place in a school setting where a couple have sex. The bf is a dominant person and controls the sex. He likes to make the female feel embarrassed. They have sex in front of another couple (They only get watched). I only read one or two chapters and there was no ntr element although there is another couple involved. I believe it should be under "Happy Sex" category.
Thanks to anyone who can help to find it!!!

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