Countrouble manga

Katsuragi Keima is known on the net as the god of getting the girls while in real life he’s known as otamegane and he hates all real girls. However he is approached by Elsee, a devil from hell, to help her in catching runaway spirits that hide in people. Apparently the spirits only hide in the hearts of girls and the only way to get the souls out is by making the girl fall in love so the spirit gets forced out. And he’s not allowed to fail or he will lose his head.

From AnimeWaves:
A young boy gets saved from drowning by a mermaid but according to mermaid law, if a human sees a mermaid's true form, both are to be executed. The only solution to the problem is for him to marry her and become part of the mermaid family.

Plot: A alternate version of Mahou Sensei Negima! that preserves the characters and setting but changes the story around.

Seiji Sawamura is the toughest seventeen-year-old in town, feared by all for his fighting prowess and his deadly "devil's right hand." But at heart, Seiji is a softy, and all he wants is an end to his seventeen-year history of being a lonely single guy. Unfortunately his tough-guy reputation only serves to decrease his popularity with the ladies. However, what happens when Midori, the only girl who actually has a crush on him, replaces his "devil's right hand?"

"Let’s make a child together!!" is what a girl who appeared out of the blue said. A pretty onee-sama and a cute girl, middle school student Takao Reiichi’s destiny is going to change in a big way since he met these two girls! Was their encounter a coi

With the destiny of searching for a bride, the youkai teenage boy came to Tokyo from a small island: Hanzou. A maiden who develops a youkai-atracting constitution at 16: Ichijouji Mei. With the youkai's heaven "Tokyo" as its stage, Girl-Meets-Monster love comedy.

Seven years ago, Amakawa Yuuto's parents died leaving him living alone without a single relative. Ever since then, his childhood friend, Kuzaki Rinko, has waken him up, cooked for him and generally taken care of him. The only thing he has from any relative is a mysterious charm, a red ball, given to him by his grandparents as a good luck charm (an omamori).

On the day of his 16th birthday, this charm mysteriously disappears, and into Yuuto's life walks Himari. A cat spirit-samurai girl and demon hunter who swears to protect Yuuto. There is only one small problem. Yuuto has a severe allergic reaction to cats! Hang on to your manga-reading chair as this slapstick love comedy with a bit of good ol' fashion demon hunting is about to begin!

Kaguya is a boy in an all-girls' school for demons [fox spirits, succubi, werewolves, etc]. Being the only human is bad enough, but the added risk of his manhood being discovered makes for silly and unbelievable (deliciously enviable) situations.

Hard working, level 1 magician Konoha is apprenticed to lazy Knight Protector Saionji Ikumaru. They both work to keep the etherworld sealed away from their own but sometimes the seal doesn't work. Dragons, demons, and now Ishtar, the goddess of Venus. Will Ishtar help Konoha win her master's affections? Or will she take him for herself?

[Taken from Mang-Project]:
KOR is the story of the Kasuga family, but mostly the oldest son, Kyosuke (who narrates), as they move to a new town after being found out to be a family of ESPers. Kyosuke meets a pretty young girl as he counts the "100 steps"