Oyamada, Iku

A story about Kazuho Akashina, a high school student who came to live at the Argo Dormitory, but ends up being placed on the girl's side of the dorm.

Blue Peter

ぶるうピーター

Matsumoto, Izumi

Sesame Street

せさみすとりーと

Lee, Kyoung Shin

Amyoung Doe and Padam Ma have always been cited as the misohnyun (handsome guy(s)) of their High School, but for some reason, they've been rivals for almost forever. Suddenly, Amyoung's mother and Padam's father marry and go off on an extended vacation, forcing them to live together at Padam's house. Then one day, Padam's father calls and tells them his deceased friend's daughter, Sihtah Ah, is coming from India to live with them. As their parents are absent, Padam and Amyoung deal with Sihtah, who seems to have a strange feline curse, and eventually, Madi Park and her friend Heesook move into the home. As Amyoung and Padam deal with each other and their quirky new guests, odd circumstances and strange cats appear. 

(Source: MangaUpdates)

Flash Cat

플래시켓

Kobayashi, Kaoru

At Inokashira High School, Kouichirou is assigned by his teacher to take care for the welcoming party for the female foreign student from Hong Kong who is going to study in his class. While he's having headache with the class's condition, he heard something loud. The source of that noise are one huge Helicopter and 3 more planes, and the girl who step out from that helicopter? She's Fang Ran, the heiress of the Chang Family, the richest family in Hong Kong.  

Fang Ran noticed Kouichirou and asked him for the direction for the Teacher Room, and soon she's introduced by the teacher in Kouichirou's class. Fang Ran remember Kouichirou and so she greet him, which cause the teacher to assign him to take care Fang Ran from now on. Read the story about Fang Ran, Kouichirou and their friends in this series.

China Girl

Fujita, Kazuko

Momoko is the only girl in a family of 6. Her brothers and father are all overly protective of her, despite the fact that she’s the most capable of the bunch, and sometimes she takes advantage of this much to her own amusement…

Momoka Typhoon!!

桃花タイフーン!!

Ousaka, Mieko

The story follows a fantasy writer and her dog.

Eien no Nohara

永遠の野原

Adachi, Mitsuru

Touch is a shounen story about two twin brothers, a pretty girl next door, and that good old pastime of baseball. The manga was written by one of the most well known manga-ka out there, Adachi Mitsuru in the early 80's (1981-1986). He's a wonderful writer who tends to write stories that are related to baseball and Koshien, the stadium where the All High School Baseball Tournament is held.

(Source: MangaProject)

Touch

タッチ

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！

Takahashi, Rumiko

In the town of Tokeizaka stands the old, worn-down boarding house known as Maison Ikkoku. For the last few years, the building has been home to a rambunctious group of tenants, including 20-year-old college applicant Yusaku Godai, its most recent resident. Recently, however, Yusaku has grown impatient with the noisy shenanigans interrupting his studies and has decided to move out. However, as he is preparing to leave, a beautiful woman named Kyoko Otonashi introduces herself as the new property manager. Falling in love with her at first sight, Yusaku changes his mind and decides to stay to court Kyoko instead.

Though he initially believes he is making progress with Kyoko, Yusaku soon discovers that she is a widow still mourning the loss of her late husband. Despite her growing feelings for Yusaku, Kyoko states that she has no intentions to remarry or even date, as she still loves her late husband. Empathizing with her, Yusaku seeks to free Kyoko from her sadness with the help of the other inhabitants of Maison Ikkoku—all in the hope that she will one day see him as more than just another tenant of the building.

[Written by MAL Rewrite]

Maison Ikkoku

めぞん一刻

Yamato Keisuke, a promising freestyle swimmer, and Ninomiya Ami, a talented diver, are the offspring of two rival families owners of confectionery shops. Two generations ago, Grandfather Ninomiya came up with an idea for an owl-shaped cake, but Grandfather Yamato quickly raised to the challenge and thought of a similar cake—but in Yamato's the owl had ears. Because they're priced the same, Yamato's extra ears were crucial, and that made the business of the Ninomiya confectionery suffered. Grandfather Ninomiya then fell ill worrying about his shop. Before his death, his last words were "I was killed by the Yamatos," and since that moment the two families have been sworn rivals. 

(Source: MU)

Rough

ラフ

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

Ragawa, Marimo

Takuya is a normal Japanese elementary student whose mother died not very long ago, leaving him alone with his father and his baby brother Minoru. But his father is a busy man, and Takuya has to look after Minoru. Because of this responsibility that would normally never burden a child of his age, Takuya sometimes resents his fate and his baby brother... but his love for Minoru gives him the strength to carry on.

(Source: ANN)

Included one-shots:
Volume 2: Time Limit
Volume 4: Secret Boy ni Tee Dasuna!!
Volume 6: Baka de Karukute Wagamama de
Volume 15: Natsu to Kimi no Irradiation

Manga Like Chikan Otoko