Season 1

The day of admission to Hayato's Little Garden. Noah and Yukiume, who came to pick up Hayato at the airport, were late for the entrance ceremony and were dropped out by the student council president Claire. It was roommate Emile who rebelled against it. Emile is also expelled from school. Claire challenges Duel to settle with the dissenting Hayato. If Hayato wins, the three dropouts will be cancelled. Hayato plans a strategy with Emile and faces a duel with Claire.

Hayato will experience the first actual battle against Savage in the Zwei Islands. Overwhelmed by the fighting power of Claire, Liddy, and Erica's student organization members, she fights well with Emile. However, the war situation deteriorated in front of the giant species, Trenta-class Savage. Emile tries to protect the downed Liddy, but Savage tears her variable suit apart. There is a bulge in the chest and an old wound under the suit.

After the actual battle with Savage, Hayato was regaining his daily routine. Meanwhile, the mission of being a bodyguard of the world-famous diva Sakura Kirishima comes in. This is to redo the live that was interrupted by the recent Savage invasion. Hayato is taken by the innocent Sakura. Hayato was wondering if this was really a world-class diva, but Sakura was overwhelmed by the performance using Hand Red at the live venue under construction.

Free time for bodyguard missions. Hayato and Emilia enjoy their time in the city of Zwei Islands. During such a good time. Claire reports that Sakura has disappeared from the hotel. While doing so, Sakura appeared in front of him, and Hayato was taken away shortly after explaining the situation to Emilia. The destination is the Zwei Gorge, a place of memories of Sakura. So Hayato decides to learn about Sakura's past ...

Return from Zwei Grand Canyon. The bus on which Hayato and Sakura ride was attacked by Savage. The two use Hand Red's abilities to respond. Soon, the friends of Little Garden join in, and when they try to get rid of Savage, a mysterious slayer of three people suddenly appears. What is their purpose ...?

Hayato and Little Garden visit the southern island for a brief break after fighting against Savage in the Zwei Islands and fighting a mysterious trio of hunters. Meanwhile, Judal who came by helicopter appears. He said that Hayato had a story, and what Hayato saw when he was guided ...

With the addition of Claudia, the Savage sweeping operation was proceeding smoothly. Meanwhile, Claudia's strategy to tear the relationship between Hayato and Emilia is activated. Hayato and Claire are left alone. The two have a very nice atmosphere, but an urgent contact arrived to break it. Fritz's team was attacked by a mysterious trio of hunters who engaged in the Zwei Islands. Claire is fully armed and confronts the hunters who have hurt her friends.

The mysterious trio of hunters-Krovanh, Nesat, Nakri and Hayato continue to engage. Hayato gets a glimpse of their past while being attacked by Krovanh. Suddenly, a dragon-shaped savage appeared from the lake. With the advent of unprecedented Savage, a truce with Krovanh and others. I'm going to fight together ...

At Little Garden, the Gardens Festa was about to be held once a year at the school. Martial arts from various countries are gathering in Little Garden to help with the security. Among them were Claudia and Wendy, who fought together in the previous operation. As the Gardens Festa begins and the inside of the ship rises, the diva Sakura Kirishima and the female scientist Vitaly Tynyanov who turned the trio of Krovanh who were captured and protected by Little Garden into artificial variants Infiltrate the ship.

Little garden that gets excited at Gardens Festa. During the live performance of the diva Sakura Kirishima, Hayato's younger sister Karen Kisaragi took the stage as a singer. Meanwhile, an unfamiliar bee-shaped mecha appears in the city. It is said that the bee-shaped mecha is making noise in various parts of the ship. This was all well planned by Vitaly. Taking advantage of the turmoil inside the ship, Vitaly advances to a room where the three Krovanhs are protected.

Vitaly continues her rampage into the Little Garden with the intent of taking it over. Krovanh and the others fight against her control, but find it difficult to resist. Meanwhile, Emile and Hayato are trying to stop more replicants from making it into the city. Sakura and Karen watch from below, but ultimately they come up with a plan...