1x15 - My Bride is a Mermaid

Nagasumi, Sun, Lunar, Mawari, Saru, and Mikawa go on what is supposed to be a double date. As Nagasumi goes to get a juice ordered by Lunar, he accidentally bumps into the class president in an intersection, whom he doesn't recognize. It is now known that the class president has a crush on Nagasumi. Nagasumi accidentally steps and breaks her glasses lying on the ground so she doesn't recognize him. After she gets new ones she recognizes Nagasumi and runs away. As soon as he catches up and asks her name she runs away again saying she'll tell him the next time they meet.