Choukou Senshi Changéríon Episode 001

A Hero!! Me? After a series of low-level cases, private investigator Akira Suzumura is suddenly tasked with solving the disappearances of several students. Meanwhile, the extradimensional group Darkzide has begun their invasion on Earth, disguising themselves as humans in order to work in secrecy. Unbeknownst to them, the group SAIDOC has been developing the very thing that can stop them, Changerion, which looks to be a success until Akira's investigation disastrously collides with their own.