The Foreigner and the storm. (Male reader x Reverse 1999)

Y/N: "Hey kid, Or I say 'Vertin', You're are not the only one who has storm immunity, And you won't be alone to face within this storm no more, The name is Y/N, The Second person who have storm immunity in front of you, With the modern day knowledge (And meta-knowledge) with my power to bring it back from my world. And also other stuff I bring along with me that you may enjoy." Y/N is your average dimensional traveler and end up in this story after getting isekai by unknown mean and being gifted with power, item, and other such you like by ROB (Random Omnipotent Being) before it's tossing you into this world, Depends your perspective really, Anyway, What Really matter however is how someone like you somehow got the same storm immunity just like timekeeper and basically got two faction attention to you now and think you're a arcanists with those properties but what they didn't know is that you're actually a human (sort of) and has the power in a way unlike other arcanists can do, Those who really know you and kept it as a secret just call you "The Foreigner", Some call you the second timekeeper, Some call you a good guardian and a brother figure over arcanists kid by spoiling them with your 21st century tech and candy, And letting them watch a video with you on your phone to pass the time, Or just call you Vertin long lost brother with your backside has the same back scar of "A moon, an eye, and interesting lines" as her, even though that mostly because you're born with this inconvenient back scar that you didn't know shape like that, Beside that and In short, You're going to derail the story in one way or the other because of your present, Oh and also taking care of multiple arcanists kid at once is your responsibility now, Including the timekeeper, But hey, At least you can aurafarm and show off your cool move to them, Right?. (Expect OOC, Bad writing, Bad grammar, and cringe once you read this, and everything including the art image do not belong to me.)