Genshin+Kamen Rider
Yang Yu, who traveled to the continent of Teyvat, found himself in the headquarters of the Fools when he opened his eyes, with an unusable Kamen Rider W belt on his waist.
He wanted to sneak away quietly, but accidentally entered the bathroom of the puppet Sandone and the girl Colombia. When being surrounded by robots, the belt suddenly activated!
When he successfully transformed and escaped, what awaited him was an invitation from the Queen of Winter - to become the twelfth executive officer?
Very nice, updated
By the way, which country are we going to?