The Angel in the Christmas (S01E04)

When Itsuki and Chitose drop by Amane's apartment for a Christmas celebration, they find out that the angel Mahiru lives next door, sparking their curiosity about her connection with Amane. Chitose, who has a passion for all things adorable, is eager to befriend Mahiru. The day after Christmas, Amane discovers that Mahiru has come down with a fever. Despite her reluctance, he persuades her to rest in his room. As Mahiru watches Amane care for her so attentively, reminiscent of the kindness she once showed him, she begins to feel more at ease.