Red String of Fate and Love

Do you know that peoples has invisible red string connecting them to other peoples that destined to be their partners for life? Ethan, a highschooler met a girl with the same string tied on his finger and the girl's finger. Clara, another highschooler in the same campus with Ethan, they destined to be a couple and to take care of each other. Will fate let them be together? or fate is against at their love?