Crossover: Yokohama’s Amnesiac Oddities

Synopsis:

My name is Yiji Yanyi. I'm an utterly ordinary human, currently suffering from amnesia, and living with two ability users who have also lost their memories.

The long-haired one is our eldest brother. He can crush little golden cubes with his bare hands.

The short-haired one is my second brother. He can glow red all over and control gravity.

Yiji, who seems incapable of anything and, in reality, still can't do anything, Yanyi: I probably have an ability too.

After living together for a while:

My name is Yiji Yanyi. I'm apparently not quite as ordinary a human as I thought, and I'm now only partially amnesiac.

My eldest brother has remembered that he has a lover and partner named Verlaine, and that the two of them once fought so fiercely they nearly blew up half of Yokohama.

My second brother still hasn't remembered anything, but that's no big deal.

I think I've developed my real ability: explosions, maybe?

And I've remembered that I seem to have a lover and partner named Reze, too.

Reze and I agreed to run away together.

Speaking of Reze...

Why does going to school seem a little different from what you told me?

---Short Skit---

Weapon Human Reze: ?!! How strange. Even when we were on missions together, Yanyi never paid attention to what people looked like.

Yanyi, with her memories back: No, actually, there aren't many humans in my current family...

Nonhuman Chuuya, the consciousness of Arahabaki: ...

Pure nonhuman Verlaine: ...

Rimbaud, the only human here: ...?

Reze: So what happened while you had amnesia, darling?

Yanyi: My two brothers aren't actually both my brothers. One of them is actually the other's mother, and then my brother's father showed up and fought with his mother, and they went all out and blew up half of Yokohama.

Reze: ? (That sounds impressive, somehow.)

Yanyi: Then, not long after it was fixed, you came along and blew up the other half.

Reze: Ahem! If anyone blew things up, it was