Series · 2026 · Animation
Unremarkably ordinary middle schoolers, Pyontaro, Hiroshi and Tsubame, wander into an extraordinary adventure when Pyontaro's little sister goes missing.
1 season · 12 episodes

Episode 01
SMALL THREE
Pyontaro, Hiroshi and Tsubame — the Small 3 — load up an odd disc from their teacher. When they're not looking, Pyontaro's little sister Futaba vanishes.

Episode 02
MULTIVERSE
Stranded in a new world, the Small 3 realize they have incredible powers. They meet other versions of themselves and learn how this reality differs.

Episode 03
ALIENS
Futaba's abductors subject her to tests, but she just wants her big bwudder. The Small 3 continue the search for Futaba and encounter a tense standoff.

Episode 04
MR. SEGAMI
As college student Segami struggles with his dystopian world, a hot schoolmate hands him an enticing flyer. Hoping to meet girls, he finds something else.

Episode 05
REBELLION
With his mind in a whirl, Segami runs into the Small 3. They witness a bold fighter pilot pit his life against an alien ship. Will it light a fire?

Episode 06
GAME ON
The Rebellion announces a guerrilla attack in Shibuya and Segami resolves to join. Meanwhile, a distraught Futaba stumbles upon a furry winged creature.

Episode 07
COUNTERATTACK
Aliens surround a sleeping Futaba! In Shibuya, Segami and his comrades fight fiercely but lose ground. As he retreats, he spots Tashiro under attack.

Episode 08
THE STRANGERS
Futaba faces off against a squad of alien soldiers to protect her new friend. Facing heavy losses, Segami and the Rebellion turn to their secret weapon.

Episode 09
THE STRONG MEN
Genius commandeers an alien walker and leads a counterattack. But two fearsome alien soldiers are en route. Meanwhile, Doc and the others seek answers.

Episode 10
TIME IS UP
As the Small 3 soar toward Shibuya, Genius runs out of options against a relentless alien warrior. Reinforcements arrive — but will it be enough?

Episode 11
WE ARE “THUNDER 3”!!
The "Small Three" arrive as live-streamed reinforcements to battle alien invaders, save Futaba, and officially debut as "THUNDER 3".

Episode 12
FINAL ATTACK
The cry rings out around the world for the Thunder 3! Humanity's last hope and their saviors against the aliens!
based on 8 votes
Unremarkably ordinary middle schoolers, Pyontaro, Hiroshi and Tsubame, wander into an extraordinary adventure when Pyontaro's little sister goes missing.
8 principal cast
Thunder 3 is available to stream on Flicksy via 6 verified sources, aggregated from publicly available embed providers. The animation has 1 season and 12 total episodes, rated 6.6/10 by 8 viewers.
Thunder 3 has 1 season with 12 episodes in total.
Thunder 3 is currently in production and returning for new episodes.
Thunder 3 airs on Fuji TV.
Thunder 3 first aired on July 9, 2026.
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