Did I Get It Wrong by Turning into a Girl with Twintails?

[First, let me make it clear that this is a gender-bender story. All right, that's all I have to say.]

Guan Shu Zhenji once had a dream: to transmigrate into a world full of youth and romance.

Well, that wish did come true.

But along with all that, hadn't a whole lot of things that shouldn't exist also appeared?

Aliens invading Earth, super warriors protecting the planet.

Guan Shu Zhenji and his friends fight hard for the future of Earth.

...And, of course, for the planet's graceful, dazzling twin tails.

"Don't get the wrong idea! I, I didn't want to turn into this on purpose!"