A fantasy drama with good premisses but a so so story in the end. It's hard to think that the two male leads are actually the same character. They look rather like big brother and his little student brother who fell for the same woman. The story gets a bit too complecated when the teacher goes back in time and meets his first love, forcing her to like him back but as a grown up now and not as her classmate. So, a really really odd love triangle is developed. The ending was so so as well. It could have been better, but at least it wasn't boring. So, 4 out of 10.