13 episodes
First episode: E1

What if by listening to the past, you could save the future?
After Felix' walkman gets fixed with clock parts, he is able to hear the past with it. And he slowly finds out his mom's death wasn't just caused by a normal disease. With help from his friends he starts to investigate and discovers the devastating reason for his mom's death.
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13 episodes
First episode: E113 episodes
First episode: E113 episodes
First episode: E1Quick answers about this series, release status, and episode totals.
3Hz first aired on September 1, 2021.
3Hz currently has 3 seasons and 39 episodes.
No official next-episode air date is listed for 3Hz right now.