findang shoujo manga pls help

sorry if this whole thing will be a bit confusing but i read this manga like a few months back and basically the plot is, is that the guy was like the son of an important family and his family is very conservative and would say that they must be married first to simply do all the couply stuff but like his girlfriend is really trying to be sweet to her bf but there’s always guards around them to stop the girl. Would be really happy if someone who read this remembers the title since i think its been a while since it updated that i forgot the title ┗( T﹏T )┛