Description

In a parallel universe, there is a world that is now being destroyed for some reason.

Now this world is already almost got ruined, polluted, corrupted, ... except the chunk: main, and related chunks.

And, however, there is a singer, who is singing a song, Hatsune Miku. Her voice is so precious that it was delaying the end of the world.
Yeah, the name of the song is Gekishou「激唱」.

You, the saver of the world, should enter the world that is falling apart, and submit the code, which is going to stop the ending process of the world.

The flag format is DH{code}.

Reference

Gekishou「激唱」