When Itsuki and Chitose visit Amane's apartment for a Christmas party only to discover that the angel Mahiru lives next door, they instantly become very curious about the relationship. Chitose, obsessed with cuteness, insists on becoming friends with Mahiru. The day after Christmas, Amane notices that Mahiru has a fever. Despite Mahiru's stubbornness, Amane convinces her to stay and rest in his room. When Mahiru sees Amane so diligently taking care of her as if returning the favor she did for him that one memorable day, it seems to put her at ease.

"Amane-kun, I want to go shopping with you during Golden week." Amane accepts Mahiru's invitation and the two get dressed up to go out on a secret date. The neighbors talk, hold hands, and fully enjoy their special day out on the town. When stopping for a break, they coincidentally bump into Yuta, who quickly puts two and two together. The next day, Itsuki and Yuta grill their buddy Amane about whether or not he has feelings for Mahiru. Amane starts to feel the pressure from his friends' sharp questions.