Hakushaku Reijou Sarah Cloria wa Kyou mo Akai Ito wo Kiru

You cut my red string of fate! One morning, Alex Hubert, a student in the knight department at Howard Royal Academy, suddenly begins to see countless red threads. The beautiful outcast Sarah Crowleagh tells him that these threads are "red strings of fate." But she cuts Alex's red string without a second thought! Alex is outraged by Sarah's selfish behavior, which has earned her the reputation of being the "witch of breakups" who breaks up lovers, but he realizes that she is actually cutting the threads of unhappy couples. Alex can't help but worry about Sarah, who is not afraid to play the bad guy and continues to isolate herself. (Source: BisouBisou Comics)