Notes from the God of Matchmaking: I Am in Charge of Human Marriage

I have a matchmaker's notebook, and you will get married with whomever I want you to get married with. I have two threads, a red thread and a black thread. The red thread makes a good relationship, and the black thread makes a bad relationship. I have a pair of scissors. No matter how loving a couple is, if I cut it with my scissors, their marriage will be completely broken. Please keep an eye on your girlfriend and wife, I'm going out... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.