The Day of the Melody

Shirabe no Hi (調べの日)

Both Youta and Odin arrive at Youta's house and are greeted by his mother Tokiko. When Tokiko is introduced to Odin, she gives her real given name, which is, Hina. Learning that, Youta laughs and intterally notes how that given name is by far one of the most common in Japan, especially for babies. Hina knows this because of her omniscience and throws a tantrum. Tokiko also sides with Odin being addressed as Hina on the notion, which pleases her. 

Believing that his father would have something to say against this, as it turns out, Youta's father Daichi also agrees to let her stay in the house. At the kitchen table where dinner is served, Youta's younger sister Sora and is immediately surprised and intrigued by Hina. To Hina's dismay, Sora's full name roughly means to be a Sky God and then learns that Youta's mother and father govern over Earth and Time respectively. 

However, she pulls through it as Hina is a true god in name and power. Afterward, Youta and Hina relax in Youta's room where they briefly talk his family. Right when Youta decides to study, this causes Hina to have an outburst, reminding him about the end of the world. So the two play an RPG video game, until Hina falls asleep. As Hina sleeps, Youta's parents observe Hina and claim the time has finally come and that they'll make sure Hina a good stay at their house.