I do understand that Mixs character seems unreasonable at the beginning, but the rest is amazing. It has a fun story, great acting, amazing chemistry and the OST is constantly playing on loop in my head. I also had my doubts in the beginning, when I watched it for the first time cuz I wasn't sure about the whole body swap thing, but Korn (Earth) is aware that it's Win (Mix) and not his sister he is talking to and seriously they were in love with eachother even before Win and Rin swapped bodies. You can't convince me otherwise