In this episode, Bell's absence puts the group in a difficult situation. Lili and Aisha decide to utilize Haruhime's newly discovered ability, which she developed through studying spellbooks. Haruhime summons five fox tails that grant Welf, Daphne, Aisha, Ouka, and Mikoto a level boost. This enhancement helps the group in their battle against the monster onslaught.

However, the fight becomes even tougher when the Moss Giant devours the crystals of the defeated monsters, gaining strength in the process. The Moss Giant's strategy appears to be exploiting the group's efforts to increase its own power. A critical moment arises when the Moss Giant severely injures Aisha, but she bravely continues fighting despite her wounds.

As the situation grows increasingly dire, the injured group members they had encountered earlier decide to make a final stand, sacrificing themselves to allow Hestia Familia to escape and spread the news of the Moss Giant. Lili, the strategist, faces a difficult choice but ultimately refuses to abandon her wounded allies. She uses her Lightning Blade to repel the monsters and rescue her comrades.

At this decisive moment, Haruhime's fox ears pick up the sound of a bell, signaling Bell's arrival. The group takes cover, allowing Bell to unleash a powerful Firebolt that flings the moss out of the cavern and into a larger chamber below. In this new environment, Bell demonstrates improved combat skills, having adapted to the conditions of the lower floors.

Bell engages in the climactic battle with the Moss Giant, noting that it is not as fast as Iguazu nor as strong as the Minotaur. The group watches from a distance, leaving the spotlight to Bell. In an epic display, Bell combines his black dagger with Firebolt, activates his runes, and names the attack "Argo Vesta." With this mighty strike, he finally defeats the Moss Giant.

With the Moss Giant's defeat, the parasitic vines infesting Chigusa and the others vanish, returning them to normal. Marie, the mermaid, expresses her gratitude and affection for Bell before they part ways. The episode concludes with Bell reuniting with his allies, all of whom played a crucial role in the battle's success.