Tokimeki Mononoke Jogakkou

A comedic Girls Love manga by Banana Nangoku. On what was supposed to be her first day of high school, Arare somehow finds herself in a different dimension and ends up at an all-girls boarding school -- for Youkai. There, Arare tries to adjust to her new life, befriending youkai Kiri and Pero, while trying to keep her identity as a human hidden.

The Manga contains examples of:

 * All Ghouls School: Based upon Japanese mythology.
 * Art Imitates Art: Arare does her best Botticelli impression
 * Beach Episode: Chapter 5.
 * Belly Buttonless: Yokai lack bellybuttons, so Arare has to hide hers to keep from being found out.
 * The Blank: There is a girl nopperabou, a creature without a face. Amusingly, she wants Arare to give her a Visual Kei makeup.
 * Catgirl: Kiri, who is a nekomata.
 * Chekhov's Gun: Arare's strength in ripping fabrics.
 * Consummate Liar: Akina is forced to be one by her instincts.
 * Cute Monster Girl
 * There are also examples of Grotesque Cute monster girls, such as the Karakasa (umbrella spirit) girls.
 * Down the Rabbit Hole
 * Ecchi: To the point of being almost borderline hentai at times.
 * To the point a human and a youkai kissing "with their lower mouths" is a plot point.
 * Emergency Transformation: Played With and Subverted
 * Exactly What It Says On the Tin: Translated title is "Heart-Pounding Excitement at Mononoke Girls' Academy".
 * Gag Boobs: Harami. Well, she is a kudan, or cow person...
 * I'm a Humanitarian: When asked what they would do if they saw a human, many of the Youkai say they would eat it.
 * Incurable Cough of Death: If a youkai who's not strong enough goes to the human world, the air there will cause their lungs to corrupt, making them cough blood and then die in a matter of days.
 * Lucky Charms Title: Tokimeki ☆ Mononoke Jogakkou
 * Playing to The Fetishes
 * Red Oni Blue Oni: And Green Oni too, but just in terms of physical appearance. They have names based upon their skin color.
 * Schoolgirl Lesbians
 * Seashell Bra: More like Seashell Bikini Bottom, when Arare rips off the bottom of her bikini while trying to cover her bellybutton and has to find a replacement.
 * Shout Out: When Arare first meets the Oni girls, she thinks they're just like Lum-chan.
 * Situational Sexuality
 * Smashing Watermelons: Chapter 5's cover page.
 * Stranger in A Strange School
 * Supernaturally Delicious and Nutritious: Almost every youkai wants to eat Arare.
 * Teacher Student Romance: It is stated in one Omake that Ms. Rokurokubi has an affair with one of her students, the yuki-onna (snow woman). There are lines even youkai won't cross.
 * One Teacher School; Are there any others besides Ms. Rokurokubi?
 * Viral Transformation: A human and youkai kissing with their lower mouth causes the human to turn into that kind of youkai.
 * Youkai
 * Youkai