Kisaragi Ninomai Friends

Chitose is the Main male character in the series Happy Lesson, who has to cope with life with his five teachers.

Chitose and Minazuki's adopted elder sister.

A highly skilled technician bent on taking over the world and Kisaragi's childhood friend. After meeting Chitose, she immediately develops a crush towards him and has been seeking to 'capture' him using both casual talking and technological force.

Chitose`s younger sister, not a blood relative. They met each other while at the orphanage.

The schools art teacher and sometimes mistaken for a child. She is a very happy person and a caring mother.

The school nurse and also a priest. Her devotion to look after Chitose is incredible. Often uses a Katana to scare positive effects out of Chitose.