Infinite Dendrogram: SP

Corpse Stronghold, Abyss Shellder: this elusive and deadly monster shook the world with its ravenous hunger, consuming any who dared enter its domain. Ignoring all those who advised her it was a fool’s errand, Riella—the young commander of Granvaloa’s adventure fleet—sets off on a voyage to hunt the creature down. With few allies at hand, a posse on her tail, and her quarry a beast of unimaginable strength, her chances do indeed look slim... That is, until she comes across a certain bear adrift on the sea with a dubious offer: “I’ll pay for the ride by breakin’ that thing!” Source: J-Novel Club