So many s** scenes but they really do have purpose for Sumin's character. Sumin feels dead inside in the present, and with her parents death and Seju's cheating, now we know why. Her life becomes meaningless s** with all these partners, instead of comfort and healing. That's all we see with Sumin and Seju when they're together because that's all that is left between them now. They have an unhealthy attachment.
Then the kind hearted Sungji comes along and shows Sumin genuine kindness and care without a motive. Sungji comforts Sumin with a hug and kind words when she needs it, instead of s** like Sumin expected, after Sungji meets her at the funeral home. I think Sumin needs to heal and wants comfort and to feel better, and Sungji reminds her of wanting that.
Then the kind hearted Sungji comes along and shows Sumin genuine kindness and care without a motive. Sungji comforts Sumin with a hug and kind words when she needs it, instead of s** like Sumin expected, after Sungji meets her at the funeral home. I think Sumin needs to heal and wants comfort and to feel better, and Sungji reminds her of wanting that.