Searching for a time travel webtoon

Hello I’m searching for a romance webtoon I read a long time ago. It was about a pink haired woman and the ML had long blue hair. I think if I remember correctly they were both mercenary and the FL was cursed or something? She’s searching for a guy who was nice to her when she was a child and also had blue hair and think the ML is but then realise it can?t be the case (except it is ‘cause turn out later in the story the dude time traveled by accident and meet her as a child)
Anyone know what webtoon I’m talking about?