The Heart Is Blue

Kim Min-ji, a high school student with an extraordinary sense of curiosity. An unidentified person harbors a grudge against her. Without even knowing each other's names, the two begin exchanging letters. Will Min-ji be able to successfully find the culprit and exact her revenge as planned? Min-ji's sweet yet bloody, turbulent romance. **Original Webtoon :** [Naver Webtoon](https://comic.naver.com/webtoon/list?titleId=852620), [Naver Series](https://series.naver.com/comic/detail.series?productNo=14451479)