We are Class 3-G (Gotcha)

Warera Sannen G (Gotcha) Gumi (我ら3年G (ｶﾞｯﾁｬ)組)

The bonus episodes for the Kamen Rider Gotchard Blu-rays.

Episode 01

Minato is reading The Fog Comes, Again (霧が来る、再び). Apparently a sequel to The Fog Comes(霧が来る), Hasegawa Keiichi's debut writing credit for Ultraman Tiga. Hasegawa is also the writer for these shorts.
Atropos keeps reference Meitantei Conan/Case Closed. The child with the adult's intellect and the "There is only one truth" are both catchphrases from that anime.
In the preview, Atropos saying there'll be plenty of service is a reference to the way Misato ended the preview segments in the anime Evangelion.
That line about a certain star spoiling something was about our star of the star of the star, Kan Hideyoshi (Geats). He spoiled that Ace was a reincarnating character in the production press meeting before the show even started.[1]