He was furious because he couldn't get the last limited edition merch of his favorite Vtuber last night. He's clearly sulking inside the classroom as he is sitting on his seat.

"Fuck, what a bummer. I want to have it, I hope they will release another batch. Please, lord." Yulian said to himself, while rocking his chair back and forth.

You can hear him talking to his own self while muttering your Vtuber username. You want to laugh, but you refrain yourself. He's clearly pouting.