Han, Yu-Rang

Hyun-Bin has been surviving on the streets by hiding the fact that she's a girl. In a tragic turn of events, her beloved little brother dies and Hyun-Bin runs away from the begging, from the gangs - straight into the clutches of a rich family. Her life might have become better but it's far from rosy: she has to undergo strict training every day and guard the family's youngest member, innocent and princess-like Yae-Ha. There are  only two rules, Hyun-Bin has to protect Yae-Ha with her life and no one must ever find out that she's a girl. It's a lonely and cold way of life but a fateful encounter with the delinquent Yun-Ha becomes a catalyst of changes to come, where loyalty and a sense of duty clash with feelings of love...

(Source: dollie_mixtures)

Love in the Mask

가면속의 사랑

Takeuchi, Naoko

"The Pretty Guardian in a Sailor Suit! Sailor Venus has arrived!"

Thirteen-year-old Minako Aino is an active tomboy who loves idols and video games, and is a popular member of Shiba Koen Junior High School's volleyball team. One day during her PE class, Minako accidentally stumbles upon a white cat, who later sidetracks her from talking to her crush. At home, Minako wonders if she is beautiful, and hearing this, the cat introduces himself as Artemis and gives her a compact mirror that shows Minako more than just her beauty.

Before she can fully take in the cat's words, Minako receives a special pen that can transform her into the masked champion of justice, Sailor V! As her carefree love-seeking days begin to include adventures against the energy-seeking Dark Agency, Minako will learn to embrace the full extent of her destiny.

[Written by MAL Rewrite]

Code Name wa Sailor V

Codename: Sailor V

コードネームはセーラーV

Hwang, Mi Ri

Gook Eun-Song is your average high school girl... that is until her attractive younger sister steals the man she had a crush on. Depressed, Eun-Song purchased a bottle of alcohol and crawled into a supposedly cursed closet in her father's furniture store. Yu Ha is your average typical bad boy. He even broke traffic regulations just to end up being chased by a couple of police officers.

Oddly enough, he also ended up in the same closet where Eun-Song is asleep from drinking too much. Yu Ha ends up sleeping in the cursed closet with Eun-Song by his side... just to find out the next day, their bodies have been *gasp* switched!

Can anything else possibly go wrong for our poor heroine?

(Source: RC-SCANS)

The Moment When a Fox Becomes a Wolf

여우가 늑대되는 순간

Jung, Yi Won

There was a legend about a guy named Kang Do-Young. He was perfect, great at sports, rich and good at fighting. Na Mirae was a girl who was the leader of a club called ‘Pink Lady’ and who also wanted to be Jiang of her whole school. For Do-Young, it was love at first sight while for Mirae, it wasn’t.

(Source: Fateful Encounters)

Legendary Kang Do-Young

When Hinako wins tickets to go see her favorite band’s concert in Hong Kong, her trip takes an unexpected turn for the worse. While she is all alone in her hotel room, a man armed with a gun burts into the room and takes something “valuable”. Who is this man, and what exactly did he steal?

Paradise e No Tobira

Paradise Gate

パラダイスへの扉

Originally written by Fujimoto Hitomi in a light novel called "Mangaka Marina Series" and its first volume is also made into manga by Taniguchi Amu. 

In the manga, the story started with Marina who is a manga artist, got a phone call from her friend in Paris saying that she found a paper with treasure map written on it in a book she found in Paris. While they were chatting on the phone, Marina heard her friend answer someone who was knocking on her door, following by the sound of her friend struggling and gun shots, then everything is silent.     

Concerns over this issues, Marina goes to tell her friend's mom about this and learns from her friend's mom that she just got a phone call from the police officer in Paris that her friend just got killed. Upon learning that her friend's mother has to go to Paris over this issue, she volunteers to go there herself, and is determined to investigate her friend's dead there.

Marina Koi Bouken

マリナ恋冒険

Fujisawa, Tooru

Eikichi Onizuka and Ryuuji Danma are members of infamous biker gang, Oni Baku. When not out riding around, they can be found in school, trying to pick up young women. This is the story of the young Onizuka, who would later become the greatest teacher in Japan.

(Source: ANN)

Shonan Junai Gumi!

GTO: The Early Years

湘南純愛組！

Adachi, Mitsuru

The story is set in a place very similar in appearance to Earth in the Edo period. However, Adachi (the mangaka) regularly reminds the reader all throughout the series that the setting is another planet in the distant future which just happens to look like Earth.

After the death of his mother, Shichimi sets out to join his step-brothers and -sister who live together in Karakuri Tenement, a place provided by the father they have never met. He finds out that each of them had different mothers (all of whom have died), but were fathered by the same man. Not long after Shichimi's arrival, the siblings decide to journey to visit the graves of each of their mothers. On this journey, they encounter many dangers.

(Source: Wikipedia)

Nijiiro Tougarashi

虹色とうがらし

Hojo, Tsukasa

The protagonists of the series are the three Kisugi sisters—Hitomi, Rui and Ai—who run a café called Cat's Eye. The sisters lead a double life as a trio of highly skilled art thieves, leaving cards with the name "Cat's Eye" at the scene of their crimes. They steal works of art (mostly paintings) that belonged to their long-missing father, Heinz (who was a famous art collector during the Nazi regime), in the hopes of him contacting them. Toshio, the police officer investigating this case is the fiancé of Hitomi. He also swears to capture and bring down the Cat's Eye Gang.

Cat's Eye

キャッツ・アイ

Hosono, Fujihiko

Nikumaru, meaning "meatball" in Japanese, is a seventeen-year-old student at Ninja High School, a special school for the training of ninja. He is short and chubby, but he possesses a super technique known as the "kamikaze", where he stirs up a whirlwind with his feet. The series introduces his many adventures and pranks as Nikumaru meets with his rivals both in and out of school.

(Source: Animeinfo)

Sasuga no Sarutobi

さすがの猿飛

Kase, Atsushi

Despite his short stature and his cowardly personality, Eisaku Yazawa dreams of one day becoming a gang leader of a nation of thugs. As he starts high school, he ends up meeting several delinquents who attend the same school as him.

(Source: MU)

Chameleon

カメレオン

Inoue, Takehiko

Watanabe, Kazuhiko

"Risk Hunters" are a special breed of professionals, willing to take on the jobs that even experienced detectives, law enforcement officers, negotiators or agents are incapable of handling. Among them, one man stands out as the strongest, as well as the strangest, risk hunter. His name is Chameleon Jail.

Included one-shots:
Volume 1: Kaede Purple
Volume 2: Hana Shonen, Jordan Mitee ni

12 Manga Like Masa ga Yuku