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In the rural town of Ayukawa, humans live side by side with monsters of different races. Though they appear to be human, these monsters have special characteristics such as the abilities to change shapes, to grow claws, to blend into walls and many others. Hatoko, nicknamed Petoko, is one such monster from the Petopeto race; she has an unfortunate tendency to, quite literally, stick to those who make contact with her. One day, she sticks to a boy named Shingo as he tries to stop her falling into a pool. During their enforced togetherness, Shingo begins to like her, but Petoko worries about whether she - as a perfectly designed trap for male humans - can ever be truly loved...
Being the insignificant heir to a talented family is rough, especially for someone who has little of his own talents and honestly desires to live up to the family name. Masahiro is the young grandson of the famed Abe no Seime. Although most consider him to be little in the face of his older male relatives, Masahiro is certain he can not only continue the family legacy but that he can stand in his own right as an Onmyouji. With the assistance of his friend Mokkun, he works to increase his skills and abilities as a spiritual protector and guide. With a great deal of will and the quiet assistance of his insightful grandfather, he will become a force of good in the battle against encroaching evil.
in my opinion these 2 are alike in a few ways, in both there are youkai (demons), spirits, gods and humans with some superpowers. in Yozakura Quartet there is an onmouyji type guy only he doesnt use different spells and stuff, his only power is being able to send youkai back to their world.also in both anime there are youkai that are evil, youkai that are kind of neutral and youkai that are basically good guys and help fight the bad guys.the only big difference between the 2 shows is the setting, Yozakura Quartet is in a modern time setting and Shounen Onmyouji plays out about a 1000 years ago.