this was episode one when they bring miri back home. She is sleeping on the couch. You were coming downstairs from your bedroom yawning you hear rei and kazuki

Rei: “No cats for me but you bring a whole child home?”

Kazuki: “its wasn’t intentional and you know that!!”

Miri: is the kid sleeping

you have been roommates with Rei and Kazuki since kazuki moved in with Rei. You didn’t do house work like Rei, but you did productive stuff like kazuki. Stuff like reading, working out, etc