The onsen world lies beneath our own has spirits which can only be seen by those who truly love onsen (japanese baths). After his grandfather dies, a japanese student summons one of these spirits...

15-years-ago Vivi, the demon, decided to leave the demon realm and come to the human world. There he found an abandoned baby and on a whim decided to keep it. Since then he lives together with Hana... but having a 14 year-old girl around you, is it really that simple?

From ShoujoMagic:
The first collection of volumized short stories by the author of "For You in Full Blossom" / 『花ざかりの君たちへ』 ("Hanazakari no Kimitachi e").

1) The Dreaming Leaf (Yume Miru Happa) -
Futaba (=Two Leaves) departs for Tokyo to attend high school there. In order to relieve the financial burden slightly and achieve independence, she finds a live-in work situation at an old mansion. She becomes (fighting) friends with one of three good-looking fortune-telling employees there, Masato, who attends her same high school and is even in her same class. But then one day, Futaba discovers the secret of the old mansion... which is--!?

2) 17 Romance (17 Juunana Romansu) -
Natsume, now in high school, was raised like the son her father never had, and so she's determined never to lose out to any man. Homare Misono has been her guy friend for 17 years. Despite their closeness, Natsume always feels the disadvantage her gender places her at. Homare is stronger and better than her at a lot of things. And after saving her from a pervert on the streets, he kisses her...!?

3) The Law of Couples (Futari no Housoku) -
The Law of Couples states that all things happen in pairs -- including people. Sakiko seems to have found her missing half in Akio, a boy in her same class who always seems to say exactly what she's thinking. But who is she falling in love with? Akio, or the part of herself that she sees in him...?

4) 3) Heart Fruit (Haato no Kajitsu) -
Meron and her best friend, Chiho, both have a crush on Uchiyama! Meron finds out after she's already told Chiho that she has a crush, so she needs to lie about who she likes in order to protect Chiho's feelings. She chooses... Ryou! The scariest, coldest guy in school, rumored to be an underground ring leader! If anyone will reject her love confession, it'll be him! It works, but then Chiho begins to cry for Meron's sake, and Meron turns to mush... she tells Chiho that she'll try harder to win Ryou's love...!? How deep is she going to dig her grave?? But... for some reason, Ryou really doesn't seem that scary to Meron...

From JShoujo Scans

Imaginary Ocean
Doora is always talking about the ocean and claims she's a mermaid. But is she really?

Trance's Purchase
Trance goes to the slave market to buy a slave. His cousin Palfiena wonders if he'll buy a useful slave. She's afraid he might make a wrong decision. When Trance comes across a cute girl who can't speak, he'd like to buy her, much against Palfiena's wishes. She thinks he's being fooled, but Trance buys her anyway...

Kianna's Tail
Kianna is a mermaid of the northern ocean. She lives a peaceful life there with her friends, until a guy arrives who wishes to kill her.

Karen's zippers
Ever since Karen was little, she always wore clothes with a zipper.
When Karen becomes an adolescent, her parents tell her she shouldn't open her zipper in front of anyone anymore. But when Karen falls in love with Rob, he discovers the zipper on her belly and opens it??

Selma's Jingle
After a lot of strict music lessons, her teacher says she's finally a full fledged musician. He tells her to go share her beautiful music with other people.
Selma goes to neighbouring Mokumoku kingdom to play for the royal family and their guests. Everyone loves her music and request her to play more but Selma promised her master she'd only play once a week. The prince doesn't like no for an answer though, and says he'll marry her if she plays for him...

1) Sunny Spots Typhoon
Kusakabe Kaoru is the prince of the school that all the girls want. But he has a secret that he doesn't want any one to know: Since his mom's death, he's been house-bound taking care of his three younger siblings and father.

2) Dawn in Eden
During the summer, Hibiya Madoka, Azuma Tatsuki, Mizuse Miwa and Nakayama Kotaro must go to cram school. Knowing that Miwa and Tatsuki both have mutual love, Madoka liking Tatsuki (but they are only partners) and Madoka and Tatsuki both hating Kotarou. How will they manage to survive on an inhabited island that they just have been stranded on?

3) Empty Boy
A boy called Ao, who hates humans, has one secret. When he touches someone’s naked skin, he can wipe out all memories of himself. But then he becomes close with his classmate Akane and gradually starts to want to touch her...?!

4) Pinocchio Dreams
Fubuki's dog, Chloe, gets hit by a car. Kio spots her and tells her to come with him to save Chloe. After Toba Daisuke, who is famous to weirdo, saves Chloe, Fubuki finds out Kio is a robot! She is shocked and creeped out but they eventually become friends.

Innocent country boy Oyamada Kouta transfers to a big city high school in his freshman year, and from day one, his life enters a world of crazy. First, a beautiful second-year student named Chizuru professes her love to him, then reveals that she is in fact a fox spirit. Frisky and flirty, her suggestive teasing of naive Kouta in front of his classmates embarrasses him to no end.

If that wasn’t enough, a gorgeous wolf spirit named Nozomu suddenly transfers to Kouta’s class and decides she wants the hapless country boy for herself. As fox girl and wolf girl vie for his heart, does Kouta have any say in this?

Walking home from school one day, Noriko is innocently caught up in a terrorist bombing. Rather than being blown to bits, she finds herself transported to another world; a world in which darkness seems on the rise, as its powers desperately search for a being known as the Awakening whom it is said will awaken the Sky Demon. She finds this new world to be dangerous and overwhelming, and Noriko has little choice but to throw her lot in with the mysteriously powerful man she encounters upon her arrival. The enigma of this world and her role in it will gradually unfold, but first things first: Noriko must learn their language!

In 2004, this manga won the 35th annual Seiun Award for best science fiction comic.

By day, Kusakabe Maron is an ordinary high-school girl with more than her share of problems. But by night, she is Kamikaze Kaito Jeanne, the reincarnation of Jeanne d'Arc, also known as Joan of Arc. Her mission: to hunt down demon-possessed paintings and exorcise the evil spirits! Too bad accomplishing this mission puts her into conflict with the authorities, who view her as a mysterious stranger vandalizing works of art. With only the help of angel-in-training Finn, she must survive high school during the day and battle evil by night!

A series of light novels ispired from the manga has also been published in 2013, written by Matsuda Shuka and illustrated by Arina Tanemura.

One day, suddenly... a night where the moon shines like never before, a boy meets the otherworldly Serin, a denizen of Chaos, only to die and become the undead. Now immortal, he can no longer exist with humans due to an ancient law... A tale of revelations that begins as he returns to Chaos, the start of a new adventure!

What is a sweet, soft-spoken girl (Ha Li Kang) to do when her brothers, having just learned fencing and martial arts, decide to test some moves out on her in order to "tame her" and make her into their "little slave?" She runs to her knightly friend (Te Hu Kang, not related to Ha Li) for protection, of course. However, what happens when, instead of comforting her, he tells her that she is a coward for running away like a puppy who needs constant protection? No, she does not break down and cry like a weak girl. Instead, she resolves to grow stronger. With rigorous training everyday, Ha Li goes from being a scared girl who cries for help to becoming the Jjang (boss of a gang) of the Doberman gang. However, events lead to Ha Li getting in an accident with a truck. Afterwards, she is reborn into the body of a beautiful, but weak, rich girl Aram Han.

At her new school, everyone is surprised at the sudden change they see in Aram, who has gone from a gloomy, good student to a rude, carefree troublemaker. Many people bully her. When Ha Li finds out that it is all due to Sin Uoo Park, the handsome prince and Jjang of the school who detests Aram, she decides to have a duel with him for the position of Jjang. What will happen next is for you to find out in this romantic comedy Korean manhwa.

Mingyum wants to become East Asia Strongest martial artist, however, he has no Zen, which makes it impossible for him to reach that goal.

One day, he gets lost and finds a group of thugs, in an attempt to save a girl, he gets beat up. But in the heat of the fight, a blond foreign girl saves his life while claiming to be his fiancée. Almost at the same time, an accident occurs and Mingyum discovers he can use a huge amount of Zen, if only for a limited amount of time.

What will happen next?

A regular school boy, Hikaru Shindo stumbles upon an old GO board while looking through his grandpa's old storage room for something worth money. From inside the board came an old spirit named Sai who once dedicated his life to GO. Together, Sai continues to search for the move people call "The god's hand" while Hikaru slowly began interest in this ancient game and walks down the road of GO.

Won the Shogakukan Manga Award in 2000.

From: Easy Going Scans:

Long ago, when danger approached the Earth, there existed people exhibiting their superhuman powers to save the planet; to help the weak; to defeat evil and to promote justice. Earth never hesitated to sacrifice such beings.

The powerless set these people apart and honored them by calling them heroes. However...the era somehow changed...

Magical☆Star Kanon 100% is a mini-series spin-off of Kami nomi zo Shiru Sekai, starring Kanon as a magical girl.

One chapter is unscanlated.

A cyberpunk-ish spin on the legendary hero, Momotarou.

In a small village, there is a legend about a person born from a sakura tree one thousand years ago. Though she appeared human in form, she could not understand love, and was therefore cruel. She was eventually destroyed. Now, the mythical Sakura tree is going to attempt to create human life once again. This time it is up to two high school students, the incredibly beautiful Tasuku and the love-allergic girl Honomi, to teach the Sakura Child about love.

Saiki Takaya, a guy who is easily misunderstood, one day finds a flask containing the succubus Lilim. She is very attractive but, she also has the tendency to drain the life force out of people. She surprises the life out of him (literally) when she kisses him unconscious. Lilim then flies off for more "food," but returns later, saying that Takaya's life-energy was the "tastiest." From then, Lilim is accepted by Takaya's parents as a live-in girlfriend of sorts, and Takaya's heart seems to start wavering towards this voluptuous devil.

From RebelliousArt:
Asahi, desperate after the loss of her best friend and boyfriend, came to the abandoned elementary school above the hill. It has been said that it's a cursed place that it will be the last place you will tread in. Those who live will not be able to return. And there, Asahi meets...!?

A series of oneshots.

Pilot for D. Gray-Man.(http://mangapark.com/search?q=dgray-man)

From Transcendence:
High school student Asahi is forced to provide blood to a childlike vampire Hikato, and becomes his "temporary" mother, until he reverts to his original self. When Asahi finds out that Hikato stayed behind to protect the human world, how will her thoughts towards him change….!?