Act Like a Boss Monster, Mr. Swallow!
The Primordial Core’s an unconquerable dungeon, the lair of the most powerful monster ever to exist, the Original Monster, the incarnation of evil — Swallow... who happens to be a lazy boss monster wh...
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Updated
Sep 25, 2026
Latest
Chapter 1
New text
checking in single manga page
Synopsis
The Primordial Core’s an unconquerable dungeon, the lair of the most powerful monster ever to exist, the Original Monster, the incarnation of evil — Swallow... who happens to be a lazy boss monster who just wants to sleep.