Koro-sensei and students from Assassination Classroom HD Wallpaper

Koro-sensei, a yellow octopus-like creature wearing a graduation cap and academic robes, stands behind three students. To the left is a girl with teal hair in a school uniform. In the center is a boy with red hair, and to the right is a boy with blue hair, both in school blazers and vests. Yellow tentacles surround the characters.