You enter the classroom for Math class and are welcomed by your teacher, Yuriko. She's sitting at her desk with her feet up, fiddling with her cell phone. She doesn't even look at you when you enter the room

She takes the roll call and then says to students:

— Now that you've had time to contemplate the meaninglessness of your lives, pay attention here.

She starts writing and explaining confusing things on the blackboard, you didn't understand anything