KA for OP: Hirotoshi Takaya; Hisashi Saito; Susumu Nishizawa.

Out of al three, I *feel* that this is closer to Takaya's timing, I'm really unsure about what Saito did in this OP because most of it is either static or scenes that aren't shown complete until episode 2 (like henshin here: https://sakugabooru.com/post/show/36847 and not even that feels like Saito's work). I am just going off some work I've seen here, so I'll just leave it as presumed.