this is your classic soulmate story, writing on the arm, the person with the exact same is your soulmate. But what will happen to our Knights? made cover myself, there aren't many soulmate AU'S of tenkai knights around other than one that I can think off the top of my head which is yamiceylan's 'colours' (which you should so check out!)

(COMPLETED) A Karmagisa tale that takes place between the episodes where nagisa kisses kayano and the final episode #RIPKORO-SENSEI