"Horimiya Piece - Episode 2" begins with the arrival of autumn and the looming challenge of Sports Day. The class representative and Miyamura discuss the upcoming event, which stirs a mix of excitement and anxiety among the students. The team lineups are announced, causing a buzz as the students discover who they will be competing with and against.

The episode then shifts to a cooking class, where the student council president, Sengoku, and Remi struggle with their culinary skills. Despite their efforts, they create chaos, much to the amusement of their classmates. Sakura, another student, steps in to help them, showcasing her patience and understanding.

Meanwhile, preparations for Sports Day continue. The students receive their Sports Day T-shirts and discuss the events they will participate in. Hori, one of the main characters, is seen practicing the cheerleading routine, which she finds challenging. Nevertheless, she remains determined and enthusiastic.

The episode also highlights the dynamic between Hori and Miyamura. Hori grows jealous when she sees Miyamura helping another girl with her studies, revealing a somewhat possessive side of her personality. However, this jealousy is short-lived, as Miyamura reassures her of his feelings.

Toward the end of the episode, Hori borrows a blazer from Mizouchi to keep warm. Miyamura notices this and grows slightly jealous, but he hides his feelings. The episode ends on a lighthearted note, with Hori and Miyamura sharing a laugh over the situation.