Isuca knows exactly what it is: a creature-hunting setup that exists to get Sakuya and Shinichirou close enough for the fanservice to hit without apology. The pastel aesthetic and moody color work make the supernatural moments land harder than they should, which means even when the plot spirals into nonsense, the show stays visually compelling. Ten episodes means no bloat, just the formula working exactly as designed for the people it was built for.
Shinichirou needs cash fast, so when his teacher offers him a housekeeping gig, he jumps at the chance. What he doesn't expect is that his new employer, Sakuya, runs the operation from a mansion filled with sealed supernatural creatures. She's the current head of an ancient exorcism family, and keeping dangerous spirits locked away is basically her day job. Things go sideways immediately when Shinichirou accidentally frees one of the captured entities, forcing him and Sakuya to work together to recapture it before it causes real damage. What should've been a simple cleaning job turns into something much weirder. From that point on, catching rogue creatures becomes routine, though "routine" is generous when you're dealing with ghosts, demons, and whatever else Sakuya's family has been hunting for centuries. The show balances absurdist comedy with genuine action sequences, mixing slapstick humor against creepy supernatural encounters. It's lighthearted enough that the chaos stays fun rather than scary, making it perfect for viewers who want action and comedy without taking things too seriously.