[Crossover + Onmyoji] Yang Tai's Encyclopedia of Yokai

Qing Shizi Yota is the strongest onmyoji in the modern world. Born with the ability to see spirits, he has more spiritual power than he could ever use and commands countless shikigami. You ask whether the Qing Shizi family is a great onmyoji clan? No, no, they're just nouveau riche. The only real connection they have to this world is probably that Qing Shizi's second son formed the Qing Shizi Oddball Detective Club. The third-generation Nurarihyon and the genius girl from the Hanakain family just happen to be members. The yokai: Yota is such a good human! We want to become his shikigami! The onmyoji: As onmyoji, we'll drive out the yokai even if it costs us our lives! Hey, you, freelance onmyoji over there, why do you have so many powerful shikigami? (They're actually real yokai.) Natsume: Ever since I met Yota, my back stopped aching, my legs stopped hurting, and yokai stopped chasing me to ask for cough syrup. Kiyotsugu: My brother's encyclopedia has been updated. This really is the perfect source of information. A few things to note: 1. The male lead is the older brother of Kiyotsugu Kiyoshiji, who is forever missing his chance to meet yokai and is a yokai-obsessed fanboy. He's Natsume's childhood friend, and the story begins when they're six. 2. Yokai will have ties to onmyoji, but they aren't summoned; they're collected. 3. The story mainly features Nurarihyon no Mago and Natsume's Book of Friends, with appearances by Inuyasha, The Morose Mononokean, The Golden Furball of Udon Country, and other yokai anime, as well as some horror films. 4. Pairing: Natsume Takashi. One-on-one romance, no angst, happy endings for everyone. The main goals are to soften Natsume's miserable childhood and spare Papa Rihon from getting killed off. Here's the blurb for now. Please take me under your wing!