Misfortune Collar summary: Fushiawase na Kamiato / 不幸せな噛み痕 Yuma Adachi, an orphaned omega high school boy raised in a facility, has always lived with the stigma of being pointed at behind his back due to his background. Despite this, Yuma dreams of one day having a family and living a happy life. One day, he meets Fujimiya, a teacher who has just been assigned to his high school. The two are instinctively drawn to each other, realizing they are fated mates. However, when Yuma notices Fujimiya’s wedding ring, he regains his senses at the last moment and walks away from him. But while still in a heat state, Yuma is attacked by Osaki, a delinquent alpha who despises omegas, and has his nape bitten. In the midst of despair, Fujimiya’s devoted support becomes Yuma’s only emotional anchor. Yet, finding this relationship increasingly painful, Yuma decides to cut ties—but…?