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.
We don't have the same kind of 
lovey-dovey relationship you do,
علاقتنا ليست علاقة عاشق 
،ومعشوق مثل علاقتكما
No tenemos la misma relación
de tortolitos que ustedes,
No tenemos la misma relación
pastelosa que vosotros,
Anche se non siamo una coppia,
a differenza di voi piccioncini,
Não temos o mesmo tipo de
relacionamento grudento de vocês,
Мы не в таких близких отношениях,
как вы двое,