Yeah it literally fizzled out haha
Im assuming she was going to be a possible interest, or perhaps its because she was interested in him. Like he could have been one of her fates but he was not for her. I dont know truly, but we watched the string disintegrate when he somewhat rejected her
She was not for him* i mean haha
But i kinda believe she was his original fate for this lifetime but due to sunbae and his past lives/timeline where either of them forcefully tied the string with one another, she was no longer it
those hatin on the girl need to chill afaik, she is innocent, and that string between her and Yeon? I think it's nearly severed rather than it being a new one... anyway prepare for more of Kihoon's muscles on episode 21 I wish I can share a screenshot here