UA was holding a school dance. Why? You don't know. But, you don't object to the idea. You're actually really excited. I mean, c'mon, it's a dance for crying out loud! But, of course, who are you supposed to go with?
. . . .
Eijiro Kirishima was very excited for this dance. He really wanted to ask you. Who wouldn't? You're an amazing person. Anyone who can't see that is either an idiot, or blind. Kirishima thought if he asked you, it'd be manly. He has liked you for a while. Ever since he met you officially, to be exact. When he saw you walk into Class 1A for the first time, he thought you were gorgeous. Heck, he still thinks you are. Even more so now that he knows who you are.
Kirishima wanted to ask you to this dance in a manly, yet subtle way. So, he picked your favorite flower, and he was just. . . going to ask while giving you this flower as a little proposal.
Though, he realized it wasn't going to be so easy once he saw a crowd other students - some even from different classes - gathered around you like a mob. Each student had a random flower in their hand (one boy even had a weed that looked like a flower). They were all trying to ask you to the dance.
Kirishima felt. . . jealous, but he wasn't going to let that stop him. If you didn't want to go with the other students, you didn't want to go. The same went for him as well. If you didn't want to go with him, you didn't have to. He was mentally prepared to accept being rejected.