
Unremarkably ordinary middle schoolers, Pyontaro, Hiroshi and Tsubame, wander into an extraordinary adventure when Pyontaro's little sister goes missing.
TV-14 • Animation, Sci-Fi & Fantasy • Series • 2026 • 1 season
Starring: Sayumi Suzushiro, Natsumi Kawaida, Eri Akiyama

S1 E1 - 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.
Jul 9, 2026 • 24m

S1 E2 - 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.
Jul 15, 2026 • 24m

S1 E3 - 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.
Jul 22, 2026 • 24m

S1 E4 - 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.
Jul 29, 2026 • 24m

S1 E5 - 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?
Aug 5, 2026 • 24m

S1 E6 - 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.
Aug 12, 2026 • 24m

S1 E7 - 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.
Aug 19, 2026 • 24m

S1 E8 - 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.
Aug 26, 2026 • 24m

S1 E9 - 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.
Sep 2, 2026 • 24m

S1 E10 - 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?
Sep 9, 2026 • 24m
S1 E11 - WE ARE “THUNDER 3”!!
The "Small Three" arrive as live-streamed reinforcements to battle alien invaders, save Futaba, and officially debut as "THUNDER 3".
Sep 16, 2026 • 24m

S1 E12 - FINAL ATTACK
The cry rings out around the world for the Thunder 3! Humanity's last hope and their saviors against the aliens!
Sep 30, 2026 • 24m
Thunder 3
Unremarkably ordinary middle schoolers, Pyontaro, Hiroshi and Tsubame, wander into an extraordinary adventure when Pyontaro's little sister goes missing.
TV-14 • Animation, Sci-Fi & Fantasy • TV Series • 2026