THIS SHOW SHUFFLED ALL MY CELLS.
As a 32 year old woman who hasn't dated in over four years, and as someone who closed all of her heart and emotions, this shook me up and woke my senses. Don't mind me showing off my card too early.
Yummy, a complex cell, got her DNA and RNA all tangled up. Knowing who she is, she just keeps forgetting what she wants and disregarding what she needs. Sounds familiar? I see Yummy in every person that passes trough my life these days. I see her in me, as well.
I'd like to switch my focus to more important topic, Woong. Goofy, down to earth, wanna do what makes me tick kinda guy, is all about himself while everything is all about her.
Writers tried to do something there, but not sure if they quite pulled it off.
No origin story to describe and justify him as a character, but we got deeper (origin) story from Ba Bi, and connected more with his core than with Woong.
Even tho we do see (somewhat) character growth in Woong (but do we?), he just seems to be unable to pull in the other foot to her. Always with one foot out, he keeps making her (and himself) doubt the point of them, finding purpose in their relationship or stabilize happiness and feelings.
From this point of view, he does seem a better fit with Seo Sae Yi, than with Yummy.
This kind of people tend to give you themselves only up until their point of comfort, never ever actually giving in. And I suppose the final pull up, grow up and/or giving in is reserved for season two, hence, the ultimately vast pride getting in our way in season one.

But, I suppose this may come as a true human nature, "please do come close to me so you melt my heart, but never close enough to make it burn of pure desire".

In the end, we see them dating for a year, one moth and four days, but never actually said I LOVE YOU to (themselves) each other.

May force be with you in second season, Yummy.