Class B-3

is a freshman homeroom class at Rider High School. It is taught by the school's head arithmetic instructor, Himura Ishida.

Overview
The class serves as one of the homeroom classes at Rider High School, for a group of twenty freshman students. The teacher, Himura Ishida, is said to be weird and eccentric by students, but likable. Seemingly the only subject covered in this class is Arithmetic.

Class Routine

 * Instructor takes attendance.
 * Arithmetic lesson.
 * Class released.

Trivia

 * Due to the prominence of the characters in this class, throughout the story, these students can be seen as primary protagonists within the series.