Re:Monster

Kanata Omokui was killed and reincarnated as Gobrou, a baby goblin in a new world. Teaming up with Gobkichi, who was born at the same time, they hunt together, dividing roles to catch their prey. As a message flows through Gobrou's mind, they add Gobmi to their group. The trio defeats enemies, and by consuming their prey, Gobrou gains new skills continuously.

Gobble, who has ranked up, evolves from a goblin to a hobgoblin. Gobble cannot accept that the parent generation goblins return to their caves and capture human women for breeding. So Gobble asks them to leave the humans with him, but the parent generation goblins are angry. And so a duel between the parent generation and the new generation begins...

Gobble evolves into an ogre. The captured adventurer girls begin to take a liking to Gobble. Gobble is given a mission, but is attacked by humans who are after the red gem on her forehead. He takes the injured Ritana back to the cave. Ritana asks the Gobble for help in fighting off the humans. Everyone is overjoyed to find the treasure that Carbuncle has been guarding, but...

A messenger from the Elven tribe arrives at Gobrou's cave, asking for help against adventurers after their treasures. Initially, the goblins refuse, seeing no benefit. After a few days, the elves return. Gobkichi evolves into an ogre, inspiring Gobkichi and Hobsei to rank up as well. The short red-haired girl also improves her skills.

Goburu and his friends capture human soldiers who are targeting the elven priestess. They learn of the human army's invasion and decide to return the priestess to the village. The next day, the Gobumi evolve into a new race. Gobuji renames everyone. Goburu becomes Oguro, and Ogurekichi becomes Gobuki. Oguro starts training with the kobolds and elves to fight against humans.

Ogrou forms the mercenary group "Para Bellum" and accepts the elves' request to repel the human army. Para Bellum members fiercely confront the enemy, capturing their targets and defeating soldiers. They use Ear Cuffs to enslave captured female knights and swordswomen, extracting truthful information about the army's main force. Para Bellum then prepares to face the Royal Army once again.

To obtain the elves' elixir, the Imperial Army deploys the Eight Heroes Cavalry Corps, blessed by the gods. Ogrou uses avatars to scatter soldiers and confronts Bug Brave, a member of the Corps. The hero creates insect-humanoids from corpses and attacks with a massive armored centipede, a disaster-grade threat. What will be Ogrou's fate?

The battle ends when the potion is handed over to the Imperials. Although there are casualties, many Parabellum members evolve. The released prisoners join tentatively, but are unhappy with their treatment, and Ogrul fights them. Ogrul improves the comfort of the base, tests his synthesis abilities, and begins farming to become self-sufficient in food. The Imperials begin to withdraw.

Ogrou and his group arrive at Trent, the girls' destination. Ogrou tells the girls to decide whether to stay in the city or continue working with him. Para Bellum members gather information, but Ogrou's appearance frightens the townspeople. Transforming into a human, Ogrou strolls around the city and sees a young knight fighting kidnappers who have kidnapped the princess of the Sternbelt Kingdom.

Ogrou and his companions escort Princess Rubilia to the royal capital, heading to the Cluster Mountains. On the way, the twin chef sisters' health deteriorates; they are pregnant with Ogrou's children and about to give birth. Ogre children grow rapidly, depleting their mothers' nutrients. With no time to return to the village, the group finds a safe cave to prepare for the births.

Para Bellum arrives at Purgatory, the final stop before the royal capital. Ogrou contacts the separate task force, but when connecting with Ogrekichi's group, he sees footage of himself being split in half. To uncover the truth, they detour to the Maze city ""Griphos."" Upon arrival, they learn that a Minotaur is rampaging inside the dungeon.

The group arrives at the Royal Capital of Oswell. After receiving their reward from Rubilia, Ogrou and the others decide to return to the village. Dhami, feeling pressured by Ogrekichi's growing strength and troubled by still being a half-vampire, undergoes special training with Ogrou and his comrades. Ogrou creates giants for Dhami to defeat, helping her level up. As night turns to dawn...