I HATE ISEON. He lied to her for 6 years, and is now trying to get back together not because he wants to make her happy, nor because he lovers her, just because it's convenient for them to be together, since his family likes her. I could argue he's equally as selfish as Soojeon.
To him, their relationship was like paying a debt, because she ''saved his family'', it kinda disturbs me to think that if Yumin hadn't heard him talking about her in that alley, she woul've been lied to without even knowing the truth for the rest of her life. Just yikes
Story is just mindless revenge porn, it makes no sense and is overall bad, but the art and characters are so yummy god...I love it