>>31821
Are you being stupid on purpose? He wasn't transported into another world. Having a, to the viewer, unknown origin isn't the same as coming from another world. Also superpowers are not a requirement for an isekai, nor are they exclusive to isekai. Actually, some sort of superpowers are present in a fuckton of nip media that isn't SoL. Even if superpowers weren't ubiquitous in anime and manga, they wouldn't support the idea of MiA being an isekai. Kazuma, the protagonist of one of the most popular isekais, is normal loser.
Also Reg isn't the MC, Riko is. More accurate would perhaps be to say that they're dual MCs, but Riko is the one that gets focused on more.