I fought a door in MIO: Memories In Orbit [EP.9]

This is episode 9 of my playthrough on MIO: Memories in Orbit. I just found an ability that makes me die in one hit. And I find a boss that's a door to try it out.. should be fun? If you haven't played MIO, first off SPOLIERS AHEAD. and I also highly recommend this game to anyone who enjoys beautiful games.. this one is worth it.