It was Bora who lied in the first place and sure you can compromise in relationships but how is it that Seulgi is the one with all the fault even in Bora's pov?!
Also, Bora doesn't look like she was into anything sadistic rather feels like she was forced by her ex with the way she reacted when she saw her.
It's quite rare for me to re-read a webtoon but Susie and Sora's story is addictive like that, somewhat dramatic somewhat realistic and warm as a whole. It's not just their hugs or kisses which reveal the intimacy between them but the way they look at each other, care for each other and even just Susie's habit of touching Sora's cheek.
All the plot points had direction and logic, even Susie's wish to wait few years. It gave Susie the courage not to give up to her fear of drifting apart when they reunite and stay persistent. For Sora, the time apart made her more patient, taught her to be mindful of other person's feelings and it gave her clarity on the depth of her feelings for Susie.
The side characters were not just a side story but a necessary part of their story. Now I really need extras with all of them in their middle age >.<