I liked the show well enough. Pete and Ae are an okay couple, although Ae is too controlling and jealous and also manhandles Pete several times (pushing him against walls, grabbing his wrist and dragging him away). But I guess it's not too unrealistic considering that he's like 18 or 19 years old and in his first serious relationship. I still liked both Ae and Pete as characters because they feel fleshed out.
But then the last episode happens and there is a literal sexual assault happening and we are supposed to be okay with it?! That's why the overall rating is so low. I was not prepared and it's just so wrong. I can overlook some other problematic stuff (like one side character making homophobic and sexist remarks) but the rape scene messed me up.
There's also a love story between two brothers, which is disturbing. (Them being stepbrothers doesn't make it better, they grew up together.)