C³: Rinkan Gakkou Confusion!
English title: C³ - CubexCursedxCurious - Outdoor School Confusion
Japanese title: -シーキューブ- 林間学校こんふゅーじょん!
Type: Special
Episodes: 1
Source: Light novel
Genres: Action, Comedy, Supernatural, Ecchi
Studios: SILVER LINK.
Duration: 29 min
Rating: PG-13 - Teens 13 or older

Unaired episode included with the fifth volume of the Blu-ray. The gang goes on a school trip.