If you were in high school and the students around you were acting weird, what would you do? Jade Ryans is in her final year of High School at Heartfelt High School and is ready to finish her last year. But just as her year starts, everything starts to go downhill. Her teacher, Ms. Keyes, in in a serious car accident and can't teach. So, she is replaced by a temporary teacher named Mr. Eunwoo Choi, who is handsome and charming. As time goes on, strange things start concurring at the school. Students are suddenly acting different and a boy band joins her school, causing a frenzy. But that isn't it, Jade seems to be unable to remember certain things about her life that she once knew. Is it all in her head or does it have to do with the mysterious new teacher she just gained? The truth behind it all may not be so pleasant to learn. (summary due to change at any moment)