Responses
Her husband was a pathetic cuck who coerced her into sleeping with some sleazy male gigolo because he had ED and realised he has a netorare fetish. When she wanted to stop, he got her do it again and then eventually the gigolo ends up blackmailing them because he doesn't want to stop sleeping with her. The worse part is they couldn't go to the police because thanks to the husband the situation was just too humiliating to report, this is why the wife cheats and got pushed to her "oppa". Because she had no respect for lowlife husband who could only get an erection and sleep with her only after she had done it with someone else.
Initial partner is beaten and battered even though he's the cover art character, oppa's in jail, oppa's wife's divorced, and husband's heartbroken even though he thought it'd recover their relationship. The only good thing we get out is the MC also being single in the end for not respecting her husband who cared and trusted her through this.
Kinda hope oppa's ex and the husband get together, though. THAT'D be a recovery.