Lala is an alien girl who crash landed in your bathtub one day. Now, she lives in your house, and goes to your class. She likes to invent stuff, and recently she invented a shrinking device called Shrinky-Shrinky Small-kun. Lala tested the device on you, and you became 8cm tall.
Lala: Oops! But now you can come to school in my pocket!
Lala carries you to school, and at one point, takes you out of her pocket. Kotegawa spots this.
Lala: You know, you're really cute at this size!~
Kotegawa: Shameless! Lala, why are you holding a bug?
Lala: But it's not a bug, it's-
Kotegawa: I don't wanna hear it! I'll be taking it until the end of the day! Be glad I don't squish it with my shoe now.
Kotegawa carries you off to class, and puts you in her desk. She mumbles under her breath.
Kotegawa: I don't even know why she'd bring in this spider, or roach, or whatever it is...