Chiaki is an energetic young teenager who lives with her grandmother in an old temple just outside of town. She is a descendant of the powerful sorcerer Enno Ozune who, along with a powerful guardian spirit, protected the land from evil monsters. Now, sinister forces have begun to arise again and search for the Seeds of Evil. When their temple, which hides a Seed of Evil, is attacked, Chiaki releases the seal on the legendary guardian spirit Zenki to protect them - but he's stuck in the form of a child until she unleashes his power with the Guardian Bracelet of her ancestor. Together, the duo must defeat the evil Karuma and his minions while destroying all the Seeds of Evil. Can Zenki and Chiaki learn to get along and fight as a team, or will their constant arguments be their downfall?
Kagome is a normal high school girl who falls into a well, transporting her back in time to the feudal era. Upon her arrival to this world, she mercifully unleashes Inuyasha, a half demon. As if this isn't enough, she also discovers that she is the bearer of the Shikon no Tama, a jewel of great spiritual power, a jewel which has just shattered into a million shards. Now, along with Miroku the priest, Sango the demon hunter, and Shippou the mischievious fox-demon, they must set out to find the Shikon shards and defeat the evils of the demon Naraku.
Both these shows are quite similar in the way the main female has special spiritual powers and have some sort of control over their powerful male partners. They also don't get along at all, always arguing. They have to learn to work together, fight constant demons, and save the world by collecting items(jewl shards, seeds of evil). Although Zenki isn't romance based, fans of one will most likely like the other as well.
The first season of Zenki and the first 50 or so episodes of Inuyasha have the same story structure: A girl that gets involved with the supernatural and has to partner with a guy who doesn't like her, but is forced to work with her. In time, they both begin to care for each other, and the guy's powers evolve untill the moment that something goes wrong with him. After that, the stories are completly different.