Gaiden: Rimuru no Karei na Kyoushi Seikatsu - Sono 1

Rimuru, who is teaching Shizu's students as a substitute at the Kingdom of Englassia's Freedom Academy, takes part in an orientation in actual field combat in the school's annual outdoor training event. Transfixed by the first place prize, they accept a challenge from the Class A Teacher, Jeff. However, an enemy appears before the students...