where jisung finds out his partner is cheating on him, so he decides to get revenge by seducing his partners best friend but falling in love with the best friend wasn't on jisungs list... _ minsung book smut sexual assault mentions and talks about self harm

Felix and his group of friends appeared to be living happily, each in a relationship, savoring the joys of life--except Felix. He felt a growing sense of isolation as his friends refused to disclose the identities of their partners. This secrecy deeply wounded Felix, especially because he developed feelings for someone within the group. The web of emotions and family trauma entangles Felix even more as he found out his friends' secret relationship that they wish Felix could join, leading him to question himself regarding his capabily of love. How will Felix react as he unravels his own heart?