Anime Crossover: The Primordial Apostle

Countless worlds, endless stretches of time and space, infinite possibilities.

Everything you could want is here!

Humans, demons, angels, holy spirits...

A storm of intelligent races sweeps across the universe!

Glory spreads throughout the world. The apostles bear the will of the True Lord, follow the path of the Origin, and seek the one and only truth in existence.

The apostles of the Origin will return to the world!

Let us spill our blood across all of time and space and call out that one and only name!

P.S. Ahem, all that above was just for fun. Here's the "real" introduction:

Yu Ji, a hardcore siscon, runs a coffee shop on Old Street and leads a quiet life away from the world. Teasing the little loli by his side, who has a debt contract with him (yeah, right), is part of his daily routine. Every now and then, it's nice to talk about life and dreams with his best buddy. He also has a cool, aloof girlfriend who likes to act tough with a knife, but as long as his little sister doesn't get mad, what's the problem? Actually, even if she does get mad, it's no big deal. What's more fun than a love-triangle showdown? Bah, as if that could ever happen. I'm going to conquer all of time and space! What, my sister ran away from home? No way, I have to bring her back! What if she runs into some creepy old guy? She's still just a little girl!!! (This is a story about a siscon and a brocon who love and fight each other. Since I'm the author, you can bet the story will be very serious. The "real" introduction is all a lie.) (stares at the sky)