This review does contain spoilers. also this review is just my personal opinion on the manga that I wrote purely out of passion for the series. so just take it with a grain of salt, yeah? (I might create a youtube video using this review as a guide.)

Edit: This review was my first review, it does not hold up to my current review standards

Ayakashi Triangle is a manga made by mangaka Kentaro Yabuki. The series contains 144 chapters or 16 volumes, and I have read all of them. I actually loved the series. because explaining this is without spoilers is hard, I'll just go into the story.

First, there are these funny(ish) ghosts called Ayakashi. Just like regular ghosts, humans can't see them without special training or having the right genes.
and apperantly when the Ayakashi are a danger to human life, they send ninjas to go kill them. These ninjas have special training and equipment to aid in the raiding of osama bin- I mean killing dangerous ayakashi. And then we are introduced to our main characters, a boy in highschool ,Kazamaki Matsuri and a girl in highschool, Kanade Suzu. They have been childhood friends since elementary school. Matsuri is one of those ninjas, and has been since middle school. Also probably the reason he has both no friends and no maidens. Damn.
While in a casual stroll through a park in I dont know where, she stops at her favourite crape shop to get some SUGAR. Did I mention she absolutely loves sweet things? Well, moving on. She encounters an aykashi in the form of a small cat. Matsuri happened to be passing by and saw the cat with a malicious intent in its eyes being carried home by Suzu, naturally he stops her. But she takes him anyway to a shrine instead of home because she was kind of angry. Matsuri goes home, defeated knowing he is damned to never get any maidens. and then his grandfather tells him that the cat is actually Shirogane, the king of Akyakashi and is trying to devour Suzu alive to gain power.

Matsuri quckly rushes over to help Suzu just in time with a save that even Ronaldo himself would be proud of. and while capturing Shirogane's power with a scroll his grandfather gifted him, Shirogane realizes that he cannot escape from being captured, but right before the scroll captures most of his power, he's going to turn Matsuri into a girl so he would be damned to never get any maidens for real.

After that, Matsuri has to adjust to being a girl and with Suzu's help, will return back to being a normal human being. And many comic antics insue.
Many characters are introduced over the series arc such as Roshka, Karaku and Kangae May. At this point, you should just go read the series yourself if you've actually read to this point you might enjoy it, you might not, but I do and I hope you can have a good rest of your day!