To defeat Manas, Ten, Leii, and Arche infiltrate Perfectus as an elite strike team, aiming for the castle. During their mission, they reunite with their missing comrade, Emero. While Ten is overjoyed by the reunion, Emero gazes at them with a stern expression and utters a chilling remark.

Determined to match Emero, who demonstrated mastery over controlling monster powers, Ten repeatedly attempts to "Unite" but fails no matter how hard he tries, growing increasingly frustrated. Then, Emero appears before Ten and the others once more, but this time, he shows even greater hostility toward them.

After defeating Manas and returning to Avrion, Ten and the others let Arche rest to recover from a sudden collapse. Ten and Leii then head to their next destination, Rahatluk, on their own. Successfully infiltrating the city, they pull a cart through the streets, only to realize someone is hiding in the cargo. That person is...

As Ten and the others panic over Chica's disappearance, Zanas once again stands in their way. Effortlessly deflecting their attacks, Zanas reveals that Chica has been captured by the Corpus before leaving. Determined to ensure their dear comrade's safety, Ten and his group rush to Rahatluk Fortress.

After a fierce battle with the Corpus, Ten and his group emerge victorious. Returning to Avrion, they throw a party to celebrate Emero's return. While everyone enjoys the festivities, Ten, worried about Arche’s absence due to poor health, goes to visit her—only to discover that she has disappeared. Together with his comrades, Ten desperately searches for her, but...

Receiving a report from Anzar, who has infiltrated Sonrisa and uncovered the guard placements, Nares assigns Ten and the group the mission to defeat L'Oreille. They land in Sonrisa and begin their advance, but while Anzar steps away to scout the enemy, they are ambushed by L'Oreille, Zanas, and Glaza.

On the day of peace negotiations, Nares faces L'Oreille with her army on the continent of. Tension fills the air as Ten and the others quietly observe the two. Declaring no intent to attack, Nares speaks calmly, but L'Oreille, with a sinister smile, unleashes the supposedly undecipherable grand magic, "Harvest Festival.

Nares wakes up in the Magus’s castle, where she is shocked to see the Oración Seis, who were believed to be dead. To her further confusion, Lisan mocks her, and standing before her is the former Magus, Diluculum. Meanwhile, Ten and the others, assaulted by L'Oreille, are swallowed by an impenetrable darkness with no light in sight.

Having completely lost their sense of self, the Oración Seis transform into Reapers and charge at Ten and the others with terrifying roars. Each of them faces a one-on-one battle, but Ten, confronted by Nares, hesitates to fight. Unable to summon any monsters, he desperately continues to call out to her, torn and unsure of what to do.

Together with Anzar, who has regained his sense of self, Ten and the others challenge the Magus Diluculum to a final battle. However, even their strongest attacks have no effect on Diluculum. As the world gradually collapses due to the "Grand Harvest Festival," Ten and his comrades continue to struggle desperately, refusing to give up.