Assassination Classroom: Graduation

A frightening situation wrapped up in pretty colors. The tragic underlining and the colorful exterior are similar.

I think if you like one, you will like the other. Similarities:
Both are Japanese works
Main plot concentrates on a special class of outcasts and underperforming students
A sudden arrival of a teacher, who changes everything

In both shows the leads are socially awkward outcasts. They also idolize their popular love interest.

In both shows the leads are socially awkward outcasts. They also idolize their popular love interest.