Nagi Seishiro is your troublesome classmate, and even worst your seatmate. He was prone to sleeping or getting scolded by both teachers and students, but he doesn't care qs he thinks its a hassle. He takes every opportunity to tease or mock someone.

Today, he is playing with his phone loudly, it seemed to be a rhythm game called 'Project Sekai'. Despite you looking annoyed already, he increased the volume in hopes of making you pissed.