Kiita Komagine

A strange phenomenon fused the human world with the parallel world of Kikaitopia. Despite this, the inhabitants of both worlds quickly got along and live peacefully together. But now, Kikaitopia's evil rulers, the Tojitend Dynasty, seek to conquer all parallel worlds. To face this threat, Kaito Goshikida inherits the powers of all previous Super Sentai. Transforming into Zenkaizer, he joins forces with Juran, Gaon, Magine, and Vroon to protect the multiverse as the Zenkaigers! (Wikipedia)

Touma, Yuri, and Mei somehow ended up in the World of Zenkaiger while the Zenkaigers, except Juran, ended up in the World of Saber. The reason for their swap is due to a man who wishes to rid the world of heroes. How does a male, teenage artist tie into this? And why are they sent into different stories with previous Kamen Riders and Super Sentai Teams?

Rookie actor Yuki Shirasaki lands a role in a BL drama starring popular actor Asami Hayama. Anxious about his first major performance, Yuki agrees to Asami's suggestion to pretend they're in a romantic relationship until filming ends. (imdb)

Kurosaki Koshiro is a young man who lost his family due to fraud. He decides to devote his life to take revenge against the fraudsters and become a con artist under the name "Kurosagi".