Futaro quits tutoring, but the quintuplets convince him to continue. The sisters seem suspiciously eager to please him, and he can’t quite figure out why.
O-Onii-chan! Yotsuba-san!
B-Bruderherz! Yotsuba!
¡Herma…! ¡Yotsuba!
¡Hermano…! ¡Yotsuba!
F-Fratellone! Yotsuba-san!
O-Onii-chan! Yotsuba-san?!
Ох... Братик! Ёцуба!