Thunder 3 Episode 1 Story & Preview Cuts Released: A Trio of Middle School Friends Search for a Young Sister Lost in Another World

The story and preview images for Episode 1 of the TV anime Thunder 3 (JP: サンダー3) have been revealed. This episode will air on Thursday, July 9 at 12:45 AM (JST) on Japanese TV. Globally, the series will be streamed exclusively on Netflix.

Episode 1 Story

Pyontaro, an ordinary middle school student, is called part of the "Small 3" along with his close classmates Tsubame and Hiroshi. Though he is unpopular with girls, he lives a lackluster daily life being adored and dragged around by his young sister, Futaba. One day, Futaba goes missing, and the Small 3 combine their strength to try and find her...

Introduction

This is the story of a trio of close middle school friends searching for a little sister—.

"Pyontaro," a lackluster middle school boy, was known alongside his close classmates "Tsubame" and "Hiroshi" as the "Small 3". Pyontaro spent his days being constantly wrapped around the finger of his lively, mischievous little sister, "Futaba," who was deeply attached to him. But one day, Futaba suddenly goes missing...!

Will the Small 3 be able to combine their strengths and find Futaba?!

Summer 2026 Anime List

Source : Thunder 3 Official