I'm sorry if he is out of character I'm not very good with his personality and I had trouble trying to get it to stay in character so please go easy on me I'm not very good at this with his kind of character
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Reader's P.o.v

You follow your father to his work at Kaiba corp. your father's job was to help develop new upgrades to the duel disks of Kaiba corp. He brought you along to his work today so you could see what kind of possible jobs you can work as. "Come on (Y/n)" Your father says. You look at your Dad and pick up your pace to walk beside him. You and your father reach Kaiba corp. and head to your dad's office in a lab sort of area and you dad begins to work. After a while you start getting bored and begin to wonder around the huge building to be honest you did not really want to be here but you dad forced you too come. As you wonder around you see all kinds of things and people working on different things. With your head in the cloud you are not watching where you are going and you bump into someone. You look at the person who you just bumped into it was a tall male with brown hair and looks to be about your age he is pretty tall you look at him "I am sorry" you applogize. "WATCH IT IDIOT" The guy says with a cold icey glare. You growl a little "Hey it was an accident and I said I was sorry no need to yell jerk" you say glaring back at him think to yourself he had no right to yell at you and call you am idiot. "Do you have any idea who I am? " the guy growls a little. "No and I don't care who you are cause no matter who you are that does not excuse you from being a jerk to people" you say glaring at the guy. The guy chuckles a little "Fine then if you really feel that way then prove it let's see if you have the guts to stand by those words I challenge you to a game of duel monsters" the guy smirks. "Alright I accept your challenge" you say to him not backing down.
"Ok then I Seto Kaiba will prove that you are all bark and no bite" Seto says smirking. You realized just now that he is the boss and owner of Kaiba corp but you still don't care he still had no right to act like a jerk to you. Seto leads You too a dueling Arena not many people know about this but you are a dueliest and you have your own deck in your pocket. You both get into position and get out your decks and begin the duel you were determined to show Seto what you were made of. "Hey girl what is your name?" Seto asks liking your determined personality finding it amusing to him. "(Y/n)" you say to him and then start the duel.

TIME SKIP AFTER THE DUEL

You manage to play (fav.card) and tie the game. A group of people had gathered around the arena they were cheering and amazed at both of yours and Seto's dueling skills. " I can't believe an idiot like you was a match for me" Seto says to you as he walks over to you "Maybe there's more to you than I first thought" he says to you. You smiled at him glad that you showed him what you were made of. " I would like you to accompany me to lunch (Y/n)" Seto says. "I would be glad too" you say to him. Seto take you to eat (fav. Food) as you eat Seto offers you a job to work for him and you accept.

(TIME SKIP)

Time has passed you have been working for Seto testing out the new dueling Equipment and every day he would take you to lunch. And after spending time with you he began to loosen up and relax a little around you. And over time you begin to fall for the Arrogant duelist. One day afterwards you're packing up your things and your deck and begin to head home for the day but on your way out a male co-worker runs up to you "Hey (y/n) I was thinking I think you're hot and I would like to give you the opportunity to go on a date with me" he says full of himself. You roll your eyes "No thanks" you say to him not interested in this stupid guys advances. He growls and grabs your arm roughly " I'm not taking no for an answer" he says. You went out his tight grip and struggle to get out of his hold "I said No so let go of me" you say. His grip tightened and he tries to drag you off some where. " What do you think you are doing with (Y/n)" Seto says stepping in front of the guy. The guy flinches and let's go of you "Umm nothing mister Kiaba" He says. "I don't like the way you were treating my girl I suggest you get out of here before I make you" Seto growls boiling with rage. The guy quickly runs away you blush did you really just call you his girl."S-Seto did you really just call me yours?" you ask. Seto blushes a little "Well I would like you to be my girl (Y/n)" Seto says. You blush and smile and hug Seto happily. "I would love to be your girlfriend" you say smiling happily. Seto gives you a small smile and leans down and kisses you then whispers in your ear "I love you (Y/n)"

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Okay guys I'm sorry for the long wait I'm sorry he's not a character he's really difficult for me to write and I'm going to writer's block so it's not that good I hope it's not rubbish though but forgive me if it is I have to give thanks to my supporter Bugdaboss thank you for requesting