Description: Two persons were destined for greatness. One is a candidate to become the Century King, and other is the son of the current king of the fangires. Together they protect people regardless of being kaijins, fangires, faunus or humans. But a certain school seeks to chain their potential. But the duo is more than ready to break the chains.

Main Characters:

Taiga Kurenai/Kamen Rider Kiva

Kohtaro/Kamen Rider Black Sun

Kouga Kurenai/Kamen Rider Dark Kiva (Taiga's father)

Kurata Mashiro/Pearlshell Fangire (Taiga's mother)

Allies:

Mezo Shoji

Yoga Aoyama

Koji Koda

Class 1-B (Monoma will become Kamen Rider Diend)

Denki Kaminari (he will be the Union Academy Traitor)

Ryuga Katsuragi/Kamen Rider Zi-O

Sento Katsuragi/Kamen Rider Geiz

Takumi Katsuragi/Kamen Rider Woz

Hitoshi Shinso/Kamen Rider Decade

Melissa Shield/Kamen Rider Tsukuyomi

Enemies:

Class 1-A (except for Kaminari, Yuga and Shoji)

Pro Heroes (they hate Kouga and want to kill his son.)

Union Headmasters (Ozpin, Sirzechs, Ironwood, Nezu, Najenda, Tsunade, Iron Man, Superman (Injustice), Hanzo and Chifuyu)

Occult Research Club

Team RWBY

Team JNPR

Team CRDL

Team SSSN

Winter Schnee

Ace Operatives

Sasuke Uchiha (he blames both Taiga and Kohtaro for turning his brother against the Uchiha Clan, even though Itachi killed his own clan in order to protect his former homeland.)

League of Darkness (Salem, All For One, Ophis, Esdeath, Obito Uchiha (Tobi), Doctor Octopus, Gorilla Grodd, Senki Shu and Squall (I.S.))

Jake Arc/Kamen Rider Shadow Moon

Isaac Midoriya/Kamen Rider Arc