Help me find this manhwa

I have literally no memory of the plot or characters names but i remember on smut scene and that the characters had crushes on each other for a long time and only just found out after moving in together

The smut scene is like a blonde boy on bottom and a redhead on top, the redhead is holding the blondes legs up and they're on their sides and there's just a speech bubble of the blonde saying something like 'omigod yess'
That's literally all I remember but I want to find it again