Spoiler: show
Because Sunrise wanted him to lol. Idk I assume it's for the sake of the plot. The teacher guy did say haruto's body showed the same symptoms as Marie's. They foreshadowed it with Marie and never really had a good reason for it to happen but did it anyway.


Also, honestly fuck a movie but I'll take a episode length OVA to add some closure to some of the things on the show. Because the current ending for the Magius and the rise of their 3rd Galactic Empire makes no real sense.