okay so just off the top of my head this is how i think i<<< would write a few pairings:

itaseo: another toxic relationship. ita would prob play yunseo i'm sorry. i'm not even talking fucks her for a while then realizes she has romantic feelings type of thing. i think they'd have messyyyy sex with heavy dom/sub dynamics and ita would try to get yunseo to accept being in an open sort of arrangement then get weirdly possessive when yunseo started fucking around with someone else bc ofc yunseo would tell. yunseo also love these small displays of jealousy and get stuck in this situationship for a while. no happy endings in sight unfortunately

buriz: errrr. i've never seen lesbians who can be just friends with benefits and stay that way, no strings attached (not saying it doesn't exist ofc), but if there WERE ! it could be these two. they're vers in every implication of the word. yunseo is fun and innocent and charming enough to make hanbin let her guard down and just have fun. hanbin in turn is the right amount of playful and direct to make yunseo understand they're not each other's romantic type and that there's nothing really serious there so she doesn't invest her heart in it

munyun: i would LOVE to age up yunseo (35~38) and make her a happy moisturized flourishing and trying sooooo hard to stay in her lane lesbian until carefree but definitely lost young adult munjung (23~26) comes into her life and kind of appears and disappears on whims. very romcom-ish relationship they figure it out without much drama

itabin: another pairing with an aged up character. ita who has had her fair share of ...interesting relationships with unstable younger girls finds yet another one with a disorganized/fearful-avoidant attachment style to lose some time with. they're fucking on the regular and hanbin oscillates wildly between wanting a monogamous relationship and like, moving out of the city to outrun her feelings. ita lets her be bc, like mentioned, she's been here before, she knows she can't change or pressure anyone into anything. karmic relationship idk how it ends or if it ever ends but they're always in each other's lives and it isn't always confusing

lijyun: lij is baby's first lesbian crush and they definitely make out when some time has passed that she's out and lij is less shy to admit she thinks yunseo is pretty. doesn't go anywhere

okay this is all i got got the moment. idk what to think about the other pairings i enjoy