It wrecks the kid's life in the first five minutes and never apologizes for it. Setsuna Kai shows up in a new city to live alone in an apartment, and the sky starts dropping rocks. He dodges one boulder, and the next one flattens the home he hasn't even unpacked in. That's the tone: a Shin Megami Tensei spinoff wearing a Saturday-morning monster-partner costume, where the friendly scientist Dr. Kaname points a machine at a stranded teenager and tells him he's a Devil Child, and that's supposed to be good news. Fifty episodes is a long time to live with a franchise that treats demons as coworkers instead of pets, and this one commits, aimed squarely at kids in 2000 while carrying SMT's bloodline underneath. Watch it for the boy standing in the rubble of an apartment he never got to sleep in.
Setsuna Kai moves to a new city because of family circumstances, planning to live alone in an apartment. The moment he arrives, a strange shower of rocks falls from the sky, and he only narrowly avoids being flattened by a huge boulder. His new home is not so fortunate: another giant boulder destroys it completely. As Setsuna stands there at a loss, a scientist named Hiromi Kaname approaches him. Dr. Kaname's instruments seem to identify Setsuna as a "Devil Child," so the doctor brings him back to his laboratory. Adapted from the Shin Megami Tensei: Devil Children franchise, the show mixes action, adventure and fantasy over fifty episodes.