Saya is an average school girl in every way but one: she's got a HUGE crush on her older brother! She's never been able to raise any flags with him (mostly due to her habit of beating him to a pulp whenever she sees him), but one day, she wakes up in the body of a cat that he brought home! Could this be her chance to make her beloved older brother fall for her?

From Yen Press:

When sweet and docile Hikaru swaps bodies with her beloved twin brother, Youta, her personality does a complete one-eighty--and she starts taking brotherly affection to a whole new level! Will Youta ever get his body back in this cracking forbidden love comedy?!

The key to save the world is in the primeval period!? Connecting the present and the past. Burning passion opens up the future!! A primeval survival mystery that passes through time and civilization!!

From MangaHelpers:
While looking for a ghost that helped him as a child, Satou Akira has run into a fair amount of spirits that he doesn't even see. One day, he goes to a supernatural detective agency for help, and he meets the adorable Yui and her devoted butler Kujou. Using her power, Yui ends up helping him with a number of the dangerous supernatural troubles he gets himself into. Akira starts to feel attached to the detective agency, and wants to learn more about the supernatural.

With God is a comic omnibus that consists of three different stories. The first story is about the underworld. The second story is about the living world. The third story is about the gods. A satire about the world and the fate of gods and men are seen through Korea's traditional gods and several main characters..

'Creepy Side', is a creepy and eerie neighborhood. A series of tragedies mixed with black comedy in this town begins!

The curse that can be loosened if kissed and the curse that cannot be resolved is just the kiss.

The world is under attack, from huge unidentified floating objects. The first attempts to stop them have been unsuccessful, some soldiers have deserted to go home to enjoy their family time.

7 heroes show up to fight the unknown threat. They fly up in the sky in a glow of light while they are enveloped in big robot frames.

Is this the time for Souya to join the heroes in a fight for humanity?
No, apparently he has to fight off the heroes.

A battle between gods and demons rage on in the mortal team, if the waifus are unsatisfied, how could the world stay peaceful? “Wait! Stop! Stop trying to lick me!”

Saito lives in an apartment full of spirits until a priestess randomly shows up claiming that she's going to protect him, but usually does the opposite and he ends up worse.

Set in a ruined world overrun with chimerical creatures where the female creatures eat the males. Two creatures explore the land: Usagi, the elder sister, protects her brother Mitsuki, a curious chronicler who is able to read the books in their secret hiding place to know that the world was once different.

The duty of a Grim Reaper is to end life, but this one falls in love with a human and commits the greatest taboo of his kind. How real is this love between "death" and a young boy?

When a ghost appears that only Noah can see, he turns to his Aunt Alice for help. She is the Cornfield Witch, after all.

This series is a painful love story of a return to the past to erase the first love. Ritsu, the main character, goes back to the past to change the future since her lover Ichijou Kaname is going to die and she tries her best to avoid him and suppress her love.

The Yiqi who sees the other person’s memories when they lock lips, falls in love with a time traveling prince. In order to retrieve his memories, the prince kisses her without hesitation. And the person in his memories looks exactly like Yiqi… Hurry and read this kissing-from-beginning-to-end manhua, an excellent time-travel story full of embarrassing and slightly masochistic scenes.

Based on the game of the same name, this manga takes the events from the game and puts them in the point of view of the heroine(s) Touko Fukawa and Genocider Syo!

The great ancient Egyptian priest, Imhotep, has come back to life in modern Japan. His mission: to defeat the race known as Magai, beings who imitate gods but desire only the destruction of the world.

Asagiri Aya, a girl bullied at school and at home. One day, an eerie website, Mahou Shoujo Site, flashes on her computer screen and welcomes her to the Mahou Shoujo World.

Munakata is an anthropology professor who studies the relationship between folklore or fairy tales and real historical events. He believes that many of these stories that most presume to be entirely fictional are actually based on real events. This manga tells the story of Professor Munakata as he follows the clues left from both the imaginary world of fairy tales and the real world of historical evidence.

In a city where adults go through the motions like robots, Mia feels claustrophobic. Meanwhile, the news is rife with stories of children getting kidnapped. One day, Mia runs into a young man named Joema. At his house, she sees fairies and children with animated faces. Are they holograms produced by his machine? But friendship with Joema comes with a price, Mia learns, as red-eyed Crows approach...