22-ji no Rule

A high school teacher named Wataru Chinen reflects on a past relationship that did not go as expected. His childhood friend, Ryusei Yamaguchi, once a carefree youth, becomes a composed adult. When Ryusei declares his feelings, Wataru is left speechless. Separate stories follow Etsu and Rio, a couple navigating early relationship challenges. Rio struggles with Etsu's past, while Etsu finds it difficult to express his emotions. In one instance, Rio stays up late after Etsu's invitation. Later, Rio attends a modeling event featuring Etsu, feeling jealous of the attention Etsu receives. In another episode, Etsu experiences jealousy, though the cause remains unclear. The stories explore the dynamics of this affectionate yet complex relationship.