The episode begins with Sengoku inviting friends over for a sleepover, including Kakeru, Miyamura, and Ishikawa. They gather in Sengoku's room, which is crammed with books, making it difficult to find sleeping space for everyone. Miyamura falls asleep quickly, and the others playfully discuss sleeping arrangements. Sengoku's loft bed is filled with books, but Kakeru insists on sleeping there because he supposedly loves "Falling Rock zones."

While trying to find comfortable sleeping positions, they engage in humorous banter and simulations to determine the best arrangement. Sengoku's concern over Miyamura's reluctance to take off his shirt leads to misunderstandings and suspicions. Eventually, the friends realize they can move the table to create more space and solve their sleeping dilemma.

When they wake up the next morning, they find Miyamura still asleep, and the friends continue teasing each other. Sengoku's attempts to figure out why Miyamura hides his skin lead to further misunderstandings and comedic moments.

The episode also highlights relationships between other characters. Remi and Kono share a sweet moment in the cold, holding hands and exchanging a kiss. Remi's jealousy and affection for Sengoku are evident, and Sakura's thoughtful gift of cookies to Remi adds a touch of warmth.

At school, the friends notice Sengoku and Kono together without Ayasaki, sparking suspicions of cheating. However, it turns out to be a misunderstanding, and Sengoku's cookie gift to Remi proves to be a considerate gesture.

The episode ends with the friends enjoying the cookies, and Sengoku's frustration over Sakura imitating him adds a humorous touch.