I was bullshitting around with Kamen Rider AUs as I do in my head sometimes, and thought “what if Haruto and Koyomi were Kamen Rider Double with magic?”
Then I imagined their henshin sequence; they stand side by side with the rings on, do the arm-W thing that Shotaro and Philip do, and swipe the rings by the belt, leaving their arms by their sides.
Then I thought to myself, “if their arms are there, they could slap their hands together, since the belts are hands as well!” And then I thought they might as well be holding hands as they transform.
Haruto x Koyomi isn’t my thing, but I think I just came up with the cutest Kamen Rider Henshin