A rock-like object was found in a construction site. While Go and K Kishida were arguing about how to deal with it, Underground Monster Gudo appeared in the quarry. On the other hand, Ancient Monster Twintail came came out of the rock-like object, bringing panic to Tokyo's Shinjuku, the subcenter of Tokyo. Go transforms into Ultraman to fight Twintail, until Gudon came as well.
| Name | Type | Role | |
|---|---|---|---|
| Shozo Uehara | Writer | ||
| Yoshiharu Tomita | Director |