Episode 11 and 12 were so cringey for me. I couldn't watch it without saying 'wtf is this' a thousand times in my head. A full grown up doing aegyo every second she meets her bf was too much for me to digest honestly. I hope the next episodes aren't the same.
I just gave it a chance without any expectations and now I'm waiting for the next eps! I didn't find anything wierd about the age gap and the childhood interaction. Them meeting in the past was completely a friendly kind of scene. People complaining about it would've watched it with a sick mind 乁 ˘ o ˘ ㄏ I'm so rooting for them!
People in the comments section calling the ending wierd makes me question if we watched the same movie or not lol. Touching male genitalia is their own way of reconciling with each other. When Jae Min made a scene at the bar, Su min accepted his apologies as an action of touching him. And when Su Min messed up at the end, Jae min accepted his apologies by touching his. And crashing the car was to cover up what Su Min had done. Also, Su min saying 'Nice to meet you' at the end was a cherry on top. In my opinion it was a perfect way to end it!
News 
I didn't find anything wierd about the age gap and the childhood interaction. Them meeting in the past was completely a friendly kind of scene. People complaining about it would've watched it with a sick mind 乁 ˘ o ˘ ㄏ
I'm so rooting for them!
1080p with English subs for anyone who needs it ;)