If I'm not mistaken, it seems like I noticed the notice in the last update that was made recently and it mentioned her raping you at night, but it hasn't happened to me until now.
Viewing post in We NEED Ending guides
(i use translate)
You have to a relationship with Joon (as in first play a game)Until you are sure that your relationship with Jun is good enough compared to old saves that you have played through and are waiting for the game to be updated. and then after you stop having sex with her for a few 2-3 days, she will change speaking and let it go until she will Can't stand it.. When you fall asleep. her will rape you