I'm the Protagonist, So Why Do I Have a Split Personality?

I'm Zhang Qiu, female, 17, and a senior in high school.

Out of nowhere, I became a young lady named Tang Ge.

Meanwhile, the original Zhang Qiu seems to have vanished off the face of the earth.

What on earth is going on? Does nobody know how fragile a high school senior's mental health already is?

Fine, fine. They say I have dissociative identity disorder.

Do I believe them? Not really.

So my journey of investigation begins!

Along the way, I meet Chen Mo, a loyal puppy of a guy. He's so annoying.

But he supports me unconditionally!

He'll make a good assistant, right?

Probably?