Not Kamen Rider, but a Proletarian Warrior!

Watanabe Shinkai, a second-year student at Fuuka High School, gets swept up in the Memory craze spreading among her classmates and accidentally becomes host to a SUN Memory.

She realizes that the abnormal weather in Fuuto is closely connected to her Memory, but that is not the only trouble it brings her. The Sonozaki family is also hot on her heels... After dealing with wave after wave of pursuers, she happens to run into Kamen Rider W while setting a mountain on fire. To her surprise, the one transforming is Hidari Shoutarou, whom she met just two days earlier.

Hidari Shoutarou: The power of the Memory is extremely dangerous. I'll help you get it out.

Watanabe Shinkai: Maybe you should deal with the Sonozaki family first.

Giving up the power of SUN now would leave her at everyone else's mercy. Watanabe Shinkai secretly flees Fuuto, only to transmigrate to another world...

"HAPPY BRITHDAY! Visitor from another world!"

Watanabe Shinkai: !!!

Honestly, is there anywhere you can escape the clutches of capital?!

And you! You accursed Greeed, give me back my desire!

Several years later, the Kamen Rider worlds undergo a great merger.

Amid the chaos, the Kamen Riders rally around a kind, radiant woman, like a deity made manifest, and make her the first chairperson under Japan's new system.

She appears on every public screen in Japan and smiles as she offers her congratulations:

"Happy birthday to me, and to everyone."

Please read before starting:

- A fun, feel-good story with a universally adored heroine. Otome elements, OOC, and original settings included; DECADE steals the spotlight (huh?).

- The background features appearances from the Ultra series.

- The story starts with an underage protagonist, but once she becomes an adult, things get wild!

Theme: A warrior woman who doesn't want to save the world