



Young Dai lives on Dermline Island, where he dreams of being a Hero. One day, a Hero and his companions come to the island. Dai is excited at first, but their true intent is to steal his best friend, Gomechan, the mythical Golden Metal Slime.

Dai must take Leona to the Earth Cave for a ritual when suddenly they are attacked!

A dark power affects Dai’s monster friends, driving them berserk. Brass tries to get Dai to leave.

A Hero trainer arrives to inform Dai that the Dark Lord has returned. To save those he cares about, Dai undergoes Hero training.

Avan turns into a dragon and attacks Dai. Dai fights back to no avail. To defeat Avan’s flames requires Wave Slash.

As Dai clears his training objective, someone enters the island. Who should appear before Avan but the worst possible being...!

Avan is overpowered by Hadlar, who is now stronger than ever. To protect his students and the world, Avan gathers the last of his strength and faces Hadlar.

Dai can do nothing but watch. Finally, the showdown between Avan and Hadlar is concluded.

After the harrowing events that transpired, Dai says his goodbyes to all his monster friends on Dermline Island and begins his great adventure with Popp.

on Dai and Popps way to King Romos' Castle they save a little girl who was alone in the woods, suddenly an unknown person with a strange weapon appears before them

The party meets Crocodine, general of the Hundred Beast Regiment, who has been given orders from Hadlar, to kill Dai.

Thanks to Maam’s help, Dai goes on the offensive against Crocodine. Popp joins in and the battle intensifies. Seeing Dai and Popp fight, Maam remembers Avan’s words to her when she was young and comes to a decision.

Maam officially joins the party and the three of them make their way to Romos where they cross paths with a familiar group of Hero's...

The All-out attack by Beast King Crocodine, who aims to conquer the Kingdom of Romos, begins!

In Romos Castle, Dai faces Crocodine. Crocodine decides to use the weapon that Zaboera gave him.

Dai is heavily wounded by Crocodine’s Beast King Vengeful Attack. Maam tries to save Dai, but is bound by a Heyedra. Masopho, the Mage from the fake Hero’s party shows this to Popp, who remains paralyzed by fear. Masopho then speaks of his past...

Popp musters up his courage to challenge Crocodine and battles the Beast King one-on-one.

Carrying on Avan's Will, Dai, Popp, And Maam work together as comrades to defeat the general of the Hundred Beast Regiment, Crocodine.

Having won the battle with Crocodine, Dai and company head to Papnica Kingdom, which is under attack by the Undead Legion of the Dark Army. Upon arrival, Dai sees an unbelievable sight. Meanwhile, Hadlar summons all Legion Commanders, but...

At the ruined castle remains in the Kingdom of Papnica, a mysterious swordsman appears. Though a genuine student of Avan, he turns out not to be an apostle of justice, but a faithful servant of the Great Demon Lord Vearn.

Hyunckel dons his Dark Armour Blade "Amudo" to face Dai and his companions. Just why does Hyunckel hate Avan so much? Hyunckel reveals his past with Avan to answer Maam’s question.

Hyunckel repels all of Dai's attacks and retaliates with a combination of the Demon Puppet Grab technique and Bloody Scryed as a finishing blow against Dai, but at that very moment an unexpected new ally appears to save him.

Thanks to Crocodine, Dai and Popp managed to escape. Popp says to Dai that if they don’t defeat Hyunckel, they won’t be able save Maam or Leona. Morning comes. Popp has come up with a plan to defeat Hyunckel and suggests the use of a certain spell.

Dai and Popp sneak into the underground demon castle only to fall into Hyunckel's trap, and are lured to the battlegrounds where they test out their lightning spell they practiced: Raidein!