Kamen Rider: Starting from the White Demon

[Knight story + gender change + marriage change + dual protagonists 1V1 + no system + not invincible + original world view] (The female protagonist's perspective is mainly the main one, there are battles and daily life, the introduction is weak and light) (Mainly the main world, we will travel through various knight worlds in the early and mid-term) An Lan, an amnesiac girl with a vicious tongue, stayed at Kitano's house and used the white magician's belt to find her lost past. Unexpectedly, the boy she looked down upon seemed to have changed overnight, muttering strange words such as "travel through" and "where is my system?" He even became lucky enough to become Kamen Rider Kuuga! At the same time, the world began to change dramatically, and everything was different.