A demon arrives to devour a human soul and accidentally catches feelings instead. The joke is that Kanan has zero romantic experience, so every date becomes a collision between demonic hunger and genuine confusion about why she'd rather be around this guy than eat him. She keeps trying to seduce him the way demons actually would, and it keeps backfiring into something real, and neither of them knows how to stop.
Kanan arrives at Youji's high school with a straightforward mission: harvest human souls for her demonic hunger. The target is clear,a lonely boy named Youji seems perfect for the job. Her plan crumbles instantly when she attempts her seduction, and somehow she ends up genuinely falling for him instead. What follows is comedy born from pure incompetence. A centuries-old demon with no romantic experience frantically googles dating advice while Youji remains oblivious to her true nature. She's supposed to be manipulating him, draining his life force, but instead she's worrying about holding hands and whether her breath smells like sulfur. Every supernatural instinct clashes with genuine feelings she doesn't know how to process. The show plays this tension for laughs as Kanan bounces between demon scheming and flustered teenager energy. She genuinely cares about Youji but keeps accidentally revealing demonic quirks. He's somehow still clueless. Their dates become chaotic messes where her schemes backfire, her friends grow suspicious, and romance blooms in the most ridiculous ways possible. It's silly, sweet, and completely unafraid to be earnest underneath the absurdity.