[because he's from a slice of life manga where literally everyone is dumb.]

I hope that you can find that person that makes you happy. [He smiles at her.] I'm sure there will be someone out there that will be head over heels for you.

What? You're not planning on stealing my flowers or my cat, are you? [Watching Yuuko's cat like actions made Mikoto's heart melt from how totally and completely adorable that was. His cheeks were turning pink, but he was also laughing.] If you do something like that, you are going to steal my heart!

[He said it so casually that for once, it wasn't like his usual dumb pick up lines.]