The name of Blocs (블락스) comes from “block” (hard rock), and their music is indeed similar to 1990s math rock and abstract sounds of that time. “Labyrinth” is the single off their upcoming first LP, so it probably shows the direction they take on the album.
Repeated, exquisite but cohesive sound of “Labyrinth” (“미로”) brings unknown pleasure, and for me this song makes a “quiet explosion”.