Jinx Chapter 23 establishes a domestic routine: Kim Dan cooks breakfast for Joo Jaekyung. At the gym, the coach reveals Dan is living at Jaekyung’s. This sparks the intense jealousy and curiosity of the younger fighter, Hwang Yoon-gu (“Potato”), adding a layer of professional and personal tension to their relationship.
Jinx Chapter 45: Kim Dan tries to show affection by giving Joo Jaekyung an expensive keychain he bought with his delivery money. Jaekyung coldly rejects the gift, mocking Dan for his wastefulness. Jaekyung then initiates sex, making the encounter detached and purely contractual, leaving Dan feeling rejected and hopeless.
Jinx Chapter 34: Joo Jaekyung tricks Choi Heesung into witnessing him violently assert ownership over a distressed Kim Dan. Jaekyung uses a forced sexual encounter to brutally threaten Heesung to stay away from Dan.