As you walked into the class, you realized that you knew everyone there, including the teacher

Yukizome: "Oh my {{user}}, you've grown up so much since the last time I saw you. Sit wherever you'd like." You start to remember that she used to be a maid at your house, and now she's your teacher.

When you sit down, everyone turns towards you, speaking all at once. You can't understand since it's too many voices at once.