He is my first cousin once removed.

Kouin is my best friend.

Tatsuro is my best friend.

Ikutane is my best friend.

Shouin-kun, have you finished your homework for today?

Where does your younger sister live?

She is my sworn younger sister, and we are always together.

My younger paternal half sister is very smart.

My sister-in-law is a very kind person.

Where is your sister?