Professional Volleyball player Hinata Shouyou accidentally time travels back in time to his High School years. After a series of events, he ends up becoming Karasuno's new Volleyball Coach. Now that Hinata-san has taken over, how is their first-ever Spring Tournament going to turn out for Karasuno? Are they going to reach the top? What about their friends and opponents? Are they ever going to find out the mystery behind the two Hinatas? (A Haikyū!! fanfic about ASAS São Paulo Hinata Shouyou meeting the Pre-Nationals Karasuno Volleyball Team) *WARNING: THIS STORY CONTAINS MANGA SPOILERS!!!*