It's spring, and it's the beginning of a new school year. The students are excited about the new term, but they're also worried about what's going to happen to their beloved teacher, who's been away for so long that he's never seen them again. They're worried that she'll drop out of the class, but she won't, because she's too far away to be of any help. The new teacher, a man named eiichirou saneki sensei, looks like he'll be teaching math and science to the students in class 3.