HP: Sorry, I'm Kamen Rider

[Dual heroines] [Hermione Granger pairing]

Harry’s twin sister, Reminara, is only a month old when her innate magic, “Aurora Veil,” is accidentally activated, sending her to the photo studio run by the Natsumi family. For eleven years, she travels through different eras with Tsukasa Kadoya and Natsumi Hikari, only ever returning to her own world.

Then, on her eleventh birthday, Tsukasa gives her an “Elemental Gem” confiscated from Dai-Shocker, and a miracle occurs. Her magic fuses with the “Elemental Gem,” creating a new Decade transformation device and a Diend gun. With these two devices, she finally masters her “Aurora Veil” magic and returns to the Potter family home for the first time in eleven years. But everything has changed beyond recognition.