Sehun prides himself on being a human calculator. That’s what his parents used to call him when he was in third grade and was able to recite all his multiplication facts when the other children were still struggling with their 6s. Numbers were always his thing, they still are. He’s the one everyone, including Baekhyun, goes to for a quick check of their numbers before turning them into Minseok and Junmyeon. And this is why when his inbox pings and he opens the email from Minseok informing him there had been an error on the forecasting figures for next quarter, Sehun almost wants to barge into Minseok’s office and throw himself on knees to apologize for such a silly mistake. The utter mortification that washes over his body as he replies to Minseok to inform him that he will correct the error right away feels horrible. How could this have happened? He’s usually so careful. 

He checks the clock. Usually, he would be gathering his belongings and getting ready to go home, but not today. No, today he has to stay until he makes sure every single one of these calculations is perfect. He would never be able to show his face to Minseok again if he turned it with even more mistakes. God, that would be horrifying. Just thinking about it stresses him out. He takes a deep breath, straightens up in his chair, pushes his glasses up the bridge of his nose, and begins working on the calculations from scratch, just to be safe. 

“Hey, did you forget it’s time to go?” Baekhyun chuckles. He’s holding his coat and his briefcase is hanging on his shoulder. “Or is Minseok making you stay late again?” 

Sehun doesn’t even want to admit to Baekhyun he made a mistake on the figures. Baekhyun is always running his numbers by him, how would Baekhyun look at him once he finds out he’s incapable of doing some simple calculations? 

“No...I made a mistake on the forecasting figures this morning and Minseok just emailed me about them right now. I’m gonna stay until I’m done fixing everything.” 

Baekhyun frowns. “What? You like, never make mistakes. Are you sure Minseok didn’t make one when he was looking at them?” 

“I just looked over them right now and yeah...I did make one, unfortunately,” Sehun sighs. 

Baekhyun pouts, then walks away. Sehun thinks the other is about to leave, but then he hears the sound of Baekhyun’s chair rolling across the floor before it stops beside his desk. Baekhyun plops his coat and bag down on the edge of Sehun’s desk before taking a seat. Sehun looks at him with a puzzled expression. 

“Well, I’m not just gonna let you sit in a dark and empty office all alone while you work on it. That’s just sad,” Baekhyun grimaces when Sehun continues to stare at him in confusion. 

Sehun looks around the office. The lights shouldn’t shut off if they know someone is still working. “It’s not dark.” 

Baekhyun pouts. Sehun is always staggered when Baekhyun does that. It makes him look so much younger than he is. The first time he saw it when the other was drunk at the company dinner. Ever since that night, he can’t he