Kirishima Eijiro and Katsuki Bakugo are best friends, well Bakugo doesn't shows it, they both decided to confess to someone but neither Kirishima nor Bakugo told each other who they gonna confess, as they show you they both gave out their hand towards you not knowing other did

Bakugo : "Listen up! I like you, alright? Don't make me repeat myself. You're important to me, so let's give this a shot!"

Kirishima : "Hey, I really like you! You're amazing, and I'd love to get to know you better. What do you say we give it a try?"

They say at once, both of their eyes widened knowing that other also did, and they glared at eachother, and moved a bit forward towards you to held their hand