But those onee-sans' breasts are really big, aren't they...

What!?

Keine's are rounder and prettier.

Why do you know something like that!?

Because I live with Keine. She told me to.

She...she and Miss Keine live together!? The way "living together" is written here is usually used for unmarried lovers rather than just housemates.

Don't...don't tell me you bathe together...

We do.

We even washed each other's backs yesterday.