4 books in series

Sakamoto Desu Ga?

Sakamoto Desu Ga? is a 4-book series with 4 primary works first released in 2013 with contributions by Nami Sano.

坂本ですが? 1
Haven't You Heard? I'm Sakamoto
Haven't You Heard? I'm Sakamoto, Vol. 2
Soy Sakamoto, ¿por?, Vol. 2
Soy Sakamoto, ¿por?, Vol. 3
Soy Sakamoto, ¿por?, Vol. 4