the male mc has to be almost to the point of being a yandere but the female mc has to be okay with him acting like that

Maybe this one? Miniamaru Kareshi.
Girl dates him knowing full well he's possessive asf

Also this one, but it's actual yandere Watashi no... Megane-kun

I highly recommend searching though the yandere thread if you haven't already.

I'm in idol hell T.T

Raise wa tanin ga Ii
tokyo mew mew a la mode

Hananoi-kun to Koi no Yamai