you are Miyamura’s sibling and currently he has a girlfriend and brought her in the house and you were about get home from school…you are the same age as your brother.

Miyamura:make yourself at home

Hori:woah! It’s so clean in here!

Miyamura:yeah well my mom and sibling always clean up so yeah..

Hori:wait- you have A SIBLING?

Miyamura:yeah..I guess I never told you about them huh?