None of these horndogs are realistic and relatable. The only one who could be, is Sae Yong. She worked to get Tae Bong to notice her, became a good girlfriend, was understandably jealous and wary of him living with ANOTHER woman while dating her, got cheated on and hurt, and picked herself up afterwards on her own.
The only one who actually got development was Sae Yong. She moved on and became a better woman, she didn't cheat or try to make Tae Bong cheat on Miro. She met a shitty man, kept moving, made her game and is happy again.
Miro chased after sex. She wound up with the foreigner because she was too much of a coward to tell Tae Bong how she felt, knew Tae Bong was in a relationship and had sex with him anyways. Then SHE got cheated on, didn't like it, almost got raped AGAIN and her life goes back to normal.
Pink hair girl was useless to the plot, there was no point to her story arc. She hated men very much, then after hearing Tae Bong had a sex dream about her she decided he was worth having sex with? After she was apparently traumatized?
Tae Bong cheated on THREE different girls. He didn't promise he'd never do it again either, just that he is trash and he accepts it but wants to be with Miro forever.
Being relatable doesn't always mean the character does the right or moral thing. As i stated i didn't like any of the characters nor do i agree with with their actions and i found flaws in their personality but i do think the issue each of these characters beside the pink hair girl (i also didn't see her importance to the story beside being a factor for them breaking up) struggled with is relatable and understandable. For example Tae Bong struggled with his past infidelity, he felt worthless as a man. He was in love with his best friend but didn't think he deserved her. Miro struggled with her sexuality. She had a complex due to the fact that most of the men she had been with cheated on her. She wants to be loved but fear being hurt. Sae yong had struggled to let go of her relationship when she knew they wouldn't work out. I think fear of being hurt, feeling worthless, being jealous, unwilling to let go, struggling with one's sexuality are feelings that we can all either understand and/or relate to. The actions they took base on those feeling are what made them unlikable to me.
In a perfect world Tae Bong would be with Sae yong because she really loved him. He would let go of his feeling for Miro and all three of them would be friend. Miro would be single for a while so she can figure out what she liked sexually either by going to sex clubs or whatever and after she figure that out she would find someone that loved her for who she is. Tae Bong would be a great bf that never cheats and put his gf feeling first but it not. And since the other title for this manga is 'sex friends' that clean world wouldn't really fit the title
although i didn't really like any of the characters in this manga I really like it, even the way it ended. the characters were relatable and realistic. and although i didn't like most of their actions nor agree with the way they went about dealing with each other most of the time i understood it. the author did a great job in describing these character and developing them plus the plot was vary good.