Description: Kai Adams used to have a happy family life even thought his parents were secretly helping the Avengers in their battles. However after the Civil War between Team Iron Man and Team Cap, the Avengers became divided, and making things worse, Thanos won the Infinity War, wiping out half of the population, including his parents. He blamed the Avengers for the loss of his parents and suddenly got an unexpected visit who asks "Do you want to share their fates or do you wish to undo what the so-called heroes did?". That's how a once innocent young boy has become the one who will extinguish the Avengers as he ends up traveling in time. What will be the people's reaction after they find out a certain being of pure malice has returned?

Main Character:

Kai Adams/Kamen Rider Ark-One

Side Characters:

Leo Adams/Kamen Rider Ichi-Gata

Sarah Adams/Kamen Rider Kiva-La

Enemies:

Avengers

Crossbones

Baron Zemo

Loki

Hela

Thanos

Ebony Maw

Corvus Glaive

Proxima Midnight

Cull Obsidian

Love Interest:

Azu/Kamen Rider Ark Zero-One (Yandere)