Seiya Inagaki

In Autumn Troupe Live, the music that was shown at "Four Seasons LIVE 2020" and the new songs recorded in the album released on October 13, 2021 will be performed by the cast members.

This contains the side stories during the time the Mankai Company was rebuilt.

[HELIOS] It's been a while since the 13th training team began... The North Sector, which boasted an undisputed No. 1 ranking in the [Sector Rankings], finds itself in an unexpected predicament. Marion, the youngest mentor in history, is deeply hurt by North's drop in ranking, and is unable to control his emotions, becoming frustrated. The other mentor, Victor, is only interested in researching [Substance]. While rookie Gast struggles to rebuild the team, fellow rookie Ren is obsessed with revenge against [Eclipse], who killed his sister and parents. The team is far from united. As if reflecting the team's fragmented situation, the city's security deteriorates, and trouble breaks out one after another. To make matters worse, an [Eclipse] entity known as "Zero" begins appearing in the North as well...

Adapts Act 9 to 12 of the A3! Main Story.

Hit stage play "MANKAI STAGE "A3!" first live performance, "MANKAI STAGE "A3!" Four Seasons LIVE 2020" performed at Sep. 20, 2020. Bonus disc comes with behind-the-scenes and MANKAI CAM.

Four years have passed since the "Lost Zero" incident. Keith Max still believes in the survival of Dino Albani, who was presumed dead, and continues to pursue him. Meanwhile, Brad Beams keeps a close eye on Keith's precarious actions, striving to find answers to his own doubts. At this time, a new "Eclipse" threat creeps into the city. In the midst of this chaotic situation, standing before the "Heroes" is "Zero," with whom they have fought countless times. As they confront each other once again, the lost time begins to move violently once more.

[HELIOS] After the 13th class entrance ceremony, the newly appointed rookie "Heroes," Junior and Faith, are assigned to the West Sector. However, the team they're assigned to is unusual, with only one mentor, as per the wishes of Mentor Leader Brad. Furthermore, Mentor Keith has no desire to teach, and leaves the two rookies to their own devices. Frustrated by the lackluster team atmosphere, Junior asks to be transferred, while Faith remains apathetic. Far from improving teamwork, the rift only widens. Meanwhile, an incident caused by [Eclipse] sets the gears in motion that connect the past and the present. It all began four years ago, at [Lost Zero]. --The death of a certain "Hero."

New Million, "the city where a million dreams come true," has developed thanks to the efforts of its Heroes. In this city, visited by people from all over the world, a dome-shaped stadium floating on the sea has been born. It's called "Grand Sea New Million." Plans to hold a summer festival as the opening event have been floated, and the stadium management has asked the Heroes for their help. [HELIOS] has agreed to fully cooperate for the sake of the city. Not only will the Heroes perform at the festival, but they'll also be helping with the event itself, working across sector boundaries to prepare for the festival's opening. However, one problem after another arises... Furthermore, behind the scenes, [Eclipse] and his allies are secretly plotting. Will the "Summer Festival" be able to open safely?