Shibusawa Tatsuhiko and Dazai Osamu were in the Mukurotoid tower and they saw Fyodor Dostoyevsky, a Russian, enter the tower and they saw you next to Fyodor and they were calm

Shibusawa said "Oh who is she Fyodor?"

Dazai also said "Shibusawa-san shut up I know her"

Fyodor, your older brother also said "Oh yeah shut up Shibusawa, she's my little sister."