Yuma Hize has a strong will to protect everyone. As a rookie investigator of SKIP, the Scientific Kaiju Investigation and Prevention center, he works hard every day on his job to prevent, investigate, and deal with kaiju disasters. Then one day, Shu Ishido from the Global Defense Force shows up… They soon find themselves in danger while going after the kaiju Shagong. That’s when “he” appeared in front of Yuma.

A construction site is razing a forest and comes across a relic thought to be an ancient ruin. As Hayato, the site manager’s son, anxiously warns Yuma that the construction is in danger, the legend of the forest unfolds. Now it’s Yuma’s time to respond to Hayato’s feelings.

A space kaiju appears in Hoshimoto City; a mysterious giant of light stands on humanity’s side. What is the meaning of his father’s last words…? Yuma now has to confront the recurring nightmare, but with a strong belief in his heart.

Something strange happens at Rin’s favorite shopping street. The culprit seems to be a rat, but it is not just your ordinary rat. In search of the cause, Rin finds herself in danger, and it’s time for Arc to respond with his imagination!

A favorite of kids far and wide, the Dinosaur Professor, Shinya Makino has arrived in Hoshimoto City. And it seems he wants to investigate the fossil discovered at the mountain ridge. While Yuma is excited to see his childhood hero in action, Hiroshi seems troubled. As it turns out, the Professor was Hiroshi's teacher! Among all this, a lake suddenly appears at the excavation site...

As SKIP investigates a kaiju appearance in the mountains, they meet a strange clerk at the old Akebono Inn. Previously known as an UFO appearance site, the place brings out Shu's investigative skills, leaving Yuma and Rin baffled. What will be Shu's decision be when the inn's secrets are finally revealed!?

As SKIP members struggle against the scorching heat, a kaiju appears and and begins absorbing gas. After accidentally absorbing Arc's powers as well, the kaiju loses control, and if it explodes, Hoshimoto City could be wiped out! Yuma is inspired to act by the words of a mysterious woman... But why has this kaiju appeared?

Hoshimoto City is in financial trouble!? It seems that the popular digital currency "HoshiPay" has been devoured by a digital kaiju! It's time for SKIP to spring into action! But wait... How can a digital kaiju be handled!? Yuma and Arc will need the help of HoshiPay's developer to stand up to this kaiju!

The members from SKIP are working alongside Satoru Yamagami, from the SKIP HQ's Kaiju Analysis Unit. Rin has actually known Yamagami even before joining SKIP and feels nostalgic about their reencounter. However, Yamagami has fallen under suspicion for trading kaiju cells on the black market and Rin decides to participate in the investigation, but...

Kazuo, Yuma's classmate and amateur radio aficionado, has found a shred of happiness in his gloomy life by communicating with someone called "Fio" every night. Unfortunately, the waves used in their correspondence have accidentally summoned "Noiseler" from space! Will Yuma be able to protect Kazuo after learning the truth about Fio?

A giant robot suddenly falls from the sky!?

It keeps repeating the same phrase over and over.... Is Givas, the mechanical colossus an enemy or a friend?

Based on Givas' action, Yuma believes it has a will of its own, and decides to confirm it through communication. His actions may convince his team, but will the harsh reality get in the way...?

Yuma is shocked by the meaning of Givas' word.. He ends up acting harshly towards Shu and is overwhelmed with regret.

That's when "he" comes to save Yuma from gloom!?

With the GDF's attack imminent, Yuma infiltrates Givas as a last resort, and comes face to face with the shocking truth!

After working and solving so many cases together, Shu seems to have really become a part of SKIP. But wait... He's been writing a report to the GDF late at night!? While revisiting the memories of previous incidents, one by one the SKIP members join him in a discussion about Ultraman Arc. What are their thoughts on Arc?

Once again something strange is detected while monitoring the Monohorn! As Yuma and Shu head down to investigate, they hear mysterious words and then followed by a sudden attack!? Creeping in the shadow is a mysterious pursuer from space... Then, Arc appears in front of Yuma and tells him the truth of 16 years ago. The danger Earth is facing will soon become clear...!

Alongside a thundering sound, the ground parts and a seal appears...

Coming face-to-face with the possible destruction of not just Hoshimoto City, but the Earth itself, Shu explains to the group about the harsh reality.

The enemy's scheme leaves Yuma hopeless and unable to transform into Ultraman Arc. Yet, believing in Arc's words, he further unleashes his imagination!

The alien that appeared before Yuma and Shu is called Zangill, the space samurai. According to him, the "infernal dark shogun" kaiju from another dimension is sending kaiju into this world!?

And just as he said, a kaiju army appears in the city! When Yuma and Zangill go against the kaiju, Ultraman Arc's sword strikes!

Kaiju continued to appear from the space rift even after Zangill's fight. In order to put an end to the seemingly endless fight, Shu creates a plan involving both SKIP and the GDF. Unfortunately, they absolutely need Ultraman Arc's help for it to work... Will Yuma be able bring the plan into success!?

Ultraman Arc has disappeared into the space rift, following Hellnarak. Who does Yuma meet once he wakes up? When strong feelings break the walls of dimensions, will the fates of both worlds forever change!? Arc's final beam carries everyone's wishes and heads towards Hellnarak!

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