The episode explores Kurumi's past, specifically her crush on an upperclassman (Senpai). During the initial outbreak on the school roof, he was bitten and turned into a zombie. Kurumi was forced to kill him with a nearby shovel to save her own life, an event that continues to haunt her dreams.
Episode 2 of the anime series (School-Live!), titled " Memories " (Omoide), primarily focuses on Kurumi Ebisuzawa and reveals the tragic origin of her iconic shovel. Key Plot Developments
Sharp-eyed viewers on Reddit noted subtle clues regarding the nature of Megumi Sakura (Megu-nee), such as other characters not directly interacting with her or her lack of a water glass during meals.
Watch a review of Episode 2 that explores Kurumi's painful backstory and the episode's themes:
The episode highlights the contrast between the girls' desperate survival tactics (rationing food, barricading stairs) and Yuki’s cheerful, oblivious behavior.