Ep. 1: Tetsu's fatal mistake and the aftermath of family conflicts

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Katou confronts his aunt regarding her abuse of his brother, leading the siblings to relocate to a room Katou had saved for. Meanwhile, Kei grows frustrated with Kishimoto’s constant mentions of Katou and accuses her of exploiting his hospitality, causing her to leave his apartment in guilt. Tetsu discovers his Gantz-issued gun functions outside the game and uses it to kill a man who refuses to accept it as payment. After being fired and facing marital suspicion, Tetsu attempts to buy milk but is surrounded by a gang mocking his weapon. In his anger, he shouts Gantz's name, which is forbidden outside the game, resulting in his immediate death just as his wife calls to report she is breastfeeding.