It's been almost 3 years sense Kuroko's little sister, Luna, left Japan. Now shes coming back but this time with a kid. 6 year-old Eiji, who has lost his parents and older brother Azume, Luna's friend. Luna reminds Eiji of his dead mother so he calls her mommy. How will Kuroko and the rest of the GoM and Seirin react to Eiji. Luna X Various