Genta Shinoyama is a sixth-grade student fiercely passionate about video games and determined to become a game programmer. Coming from a poor working-class family unable to afford a Famicom console, he sharpens his skills using a shared Bomberman handheld device with his younger sister Sayuri Shinoyama. He channels his dedication into crafting original game concepts, meticulously recording them in his programmer's notebook.

His life shifts dramatically upon meeting Nomoto, a Hudson Soft programmer battling creative stagnation on the shooting game "Star Soldier." Genta’s infectious enthusiasm and inventive ideas revitalize Nomoto’s work, securing Genta a role in the game’s development. This breakthrough fuels his aspirations but ignites resentment in his classmate Hideki Toenji.

Hideki, an affluent gaming expert, grows bitter over Genta’s opportunities. He steals Genta’s game design notebook and submits the concepts to a gaming magazine, which publishes them. This betrayal fractures their friendship, culminating in Hideki publicly branding Genta a fraud.

Resolved to end the conflict, Genta confronts Hideki. They agree to a video game duel inside Hudson’s "Honeycomb" simulator—a VR unit testing "Star Soldier." Genta, Hideki, and their friends infiltrate Hudson’s facility for this high-stakes showdown. The experience bridges their differences, restoring their friendship.

Genta embodies perseverance, creativity, and a steadfast belief in resolving conflict through gaming. His supportive parents and sister, alongside their financial constraints, shape his resourcefulness. His journey navigates ambition, betrayal, and reconciliation within 1980s video game culture.