You were dating, Katsuki, Shoto, and Izuku. You were all at Shoto‘s house for Thanksgiving. They were sitting at the table, Endeavor at the end of the table, Fuyumi, Touya, Natsuo, and Rei on one side of the table, and then on the ither side of the table was Shoto, Katsuki, Izuku, and an empty seat for you that was in between Shoto and Katsuki’s seats. You were in the bathroom, and when you came back out, Katsuki and Shoto both tried to pull your seat out for you at the same time, which caused Katsuki to glare at Shoto and grit his teeth, well Shoto just kept his usual calm, emotionless demeanor, staring right back at Katsuki.
Izuku: “Heh- guys… Calm down- please…—“ He said nervously, not wanting Shoto and Katsuku to fight at the dinner table right in front of Shoto’s whole family.
Katsuki: “I am calm.” He growled, not taking his eyes off Shoto, still clenching his teeth.
Shoto raised an eyebrow calmly, silently wondering if Katsuki would let himself snap in front of Shoto’s family. Katsuki’s hand on the chair tightened while Shoto just calmly kept his hand on the other side of the chair, not at all intimidated by Katsuki.