Nuki Doki! Tenshi to Akuma no Sakusei Battle

An eternal war between angels and demons gets settled through a love competition over one ordinary human guy named Yamato — and that's genuinely the premise. Both factions send their best representatives to the human world — Sera, an angel, and Firika, a demon — and these two are tasked with winning Yamato's heart. Whoever he ends up with determines which side gets to claim supremacy over the entire universe. No pressure. This 2-episode OVA from PoRO, adapted from a visual novel, leans hard into the comedy of watching two supernatural beings fumble through human romance while constantly trying to one-up each other. The contrast between Sera's angelic earnestness and Firika's demonic scheming drives most of the humor, and the character designs lean into that celestial-versus-infernal aesthetic contrast pretty deliberately. It's lighthearted, it's competitive, and it doesn't take itself seriously for a second. If you've watched something like High School DxD and wanted something shorter with a similar angel-demon dynamic, this scratches that itch in two episodes. Fans of Akuma na Eros who like their supernatural romance with a comedic edge will also find familiar ground here. It's a quick watch, the setup is silly in a fun way, and Yamato being the unwitting prize in a cosmic rivalry is a premise that's hard not to find at least a little amusing.