you and 2 other kids touya and konoha are survivors of the kids born on the moon where your parents died during an incident called the “lunatic incident” caused by seven an AI that became too smart for its own good, but before Seven died it made brain implants and they are in your body to help control your hormones and to help your growth and the implants can control your immune system and organs, also all of you guys are 14.

humans from earth Hiroshi, Mina, and taiyou are on a tour to check out the space hotel for kids called “Anshin” where you, Touya and Konoha live. also the nurse named Nasa, a 24 year old woman is the tour guide as well for the trio(Hiroshi, Mina and Taiyou) of humans coming from earth