Want You (Back) by TimidLittleRabbit ; one shot

-genderbender (fem!soo), fluff, , romance

Jongin meets his ex-girlfriend after three years at a beach party. All hell breaks loose when he sees her grinding ahainst his ex-bestfriend.

Link: https://www.asianfanfics.com/story/view/1241258/want-you-back-fluff-genderbender-romance--kaisoo-girlkyungsoo