Why Did We Have to Walk All the Way Through the Forest?

The teacher is furious after the class walks out. She singles out Cas and hands down a severe punishment. While serving his punishment, Cas stumbles upon the teacher's mysterious suitcase and takes it with him. What does he plan to do with it? Pip helps Famke find the perfect candidate to kiss. Jessey and Miley both have their eyes on Vince, but will he even realize that they like him?