Haikyuu!! Episode 13 -

The episode establishes the "Battle at the Garbage Dump" rivalry between the "Crows" (Karasuno) and the "Cats" (Nekoma). Season 2, Episode 13: "Simple, Pure Strength"

Karasuno loses the second set 25-23, and despite Hinata's plea for a rematch, they lose two more follow-up games. Haikyuu!! Episode 13

The team realizes Hyakuzawa is a beginner and uses a "soft block" strategy to slow down his spikes rather than trying to stop them outright. The episode establishes the "Battle at the Garbage

Hinata begins trying to keep his eyes open during his quick attacks to gain better control. Coach Keishin Ukai officially decides to stay on as Karasuno's full-time coach after the game, fueled by the desire to beat Nekoma at Nationals. Hinata begins trying to keep his eyes open

Karasuno struggles against Yūdai Hyakuzawa , a 201cm (6'7") player who is nearly impossible to block due to his sheer height.

Karasuno wins the match, and Hinata successfully scores the final point with a block-out against the giant. The episode ends with Hinata protecting Kiyoko from the flirtatious players of Johzenji High , their next opponent. Season 4, Episode 13: "The Second Day" Rival (Episode) | Haikyū!! Wiki | Fandom

In the Haikyuu!! anime series, refers to different plot milestones depending on which season you are watching. Season 1, Episode 13: "Rival"