Shun is sharing his tangerine and ends up going to Kaname's house, but Chizuru, Yuki and Yuta end up going too and all 5 stay for dinner. While it was expected they would leave after dinner, instead at Chizuru's suggestion, it becomes their first 5 person sleepover.
Look, you can even see Canis 
Major and Canis Minor.
Mira, está la osa mayor y la osa menor.
Mira, está la osa mayor y la osa menor.
Olha, dá para ver a Canis 
Major e a Canis Minor.