I am trying to re-find a webtoon, this is everything i can remember about it; a universe where soulmates are decided, everyone gets one. some people stay together, while others pursue their careers respectively. The universe works that if your soulmate dies you will die also, forcing people to stay together. The story centers around a girl (forgot her name) who find hers but runs away from it. She feels guilty because she killed her friends soulmate as a child and subsequently killed her friend. When the soulmates see each other they know they are soulmates. The guy sees her working at a nursery, and on a train.
All i remember about him is that he got into a lot of fights. also i think he had a young sibling
Set in a high school
Genre; Romance, Drama, Fantasy
Can't remember the names of the characters, have tried searching what i do remember but nothing comes up. 
would really like to finish it if possible.
