This one stares at you instead of entertaining you, and that's exactly why half its audience bailed by episode three. Divine Gate spends its runtime soaking Aoto in rain and blue light while everyone around him processes trauma out loud, and the fights are almost an afterthought to the mood. The hook for the people who stayed is the mythology cosplay: adepts named Arthur, Loki, and Akane moving through a World Council structure that treats gods and legends like recruitable assets. It jumps focus between episodes so hard you'll lose the thread of who wants the gate open and why, which is a real flaw, not a puzzle. But the OP and ED go absurdly hard for a mobile game adaptation, and the character intros land fast enough that you're attached before the plot loses you. Watch it for the atmosphere and Aoto's father problem, not the answers.

Three worlds collide when the Divine Gate opens and links the living world, the heavens and the underworld, bringing an age of chaos. The World Council forms to restore order, and over time the gate is dismissed as a legend told to children. The Council's members are Adapters, people born with elemental powers that came from the merging of the worlds, and it trains young Adapters at its own academy. Aoto, a teenager with exceptional water powers and a tragic past, keeps turning down the offer to enroll. He gives in only after the lively wind user Midori and the headstrong fire user Akane wear him down. Alongside the Council and its enigmatic leader Arthur, they search for the gate in hopes of learning the truth. Whoever reaches it is said to be able to remake the world, though whether that would change the past or the future remains an open question. To get there, they have to work together and overcome their own despair while trouble stirs behind the scenes.