Official Girls' Frontline 4koma by SUNBORN Japan

Girls' Frontline JP Twitter: https://twitter.com/GirlsFrontline

Girls' Frontline is a mobile game developed by MICA TEAM.

Sakura Sanami, a newbie from the newspaper club, was deeply moved when she listened to a musical performance during an interview with Ryukoku Iwao. And in order to really be able to get that excitement she felt across to everyone she decided to...start playing it herself? A 4-koma slice-of-life manga about traditional Japanese festival bands and the music they play.

Do (beep) with me. Why would I, you lunatic!
A story about the messy cohabitation of the Lord Devil, who has come to the human realm searching for a bride, and the male student who falls under his radar.

[from cotton candy scans]

“Starting from today, I’ll be your husband.”

The person I’ve admired for so long suddenly becomes my “husband?!" Takatsuki Honoka, 22 years old. I’ve been crushing on someone since I was in high school. He’s my father’s subordinate, the cool and handsome, yet super kind Nagakura Kousuke-san. One day, Kousuke-san suddenly becomes my “husband…!”
“Honoka…” Kousuke whispered into a confused Honoka’s ear…?

Cute powerful vampire girls daily struggles

Ako was an ordinary school student until she suddenly remembered that she was a demon in her past life...Then she finds that the angel who brought about her death in the previous life has also been reincarnated. And he is none other than her present boyfriend, Yoshi. Ako decides to retaliate against her enemy of her past life, but unfortunately, she cannot evade her attraction towards him! Can she be successful in getting her revenge?

From Vices and Devices:

Yumeji has a big problem, and no, it's not that he's gay (for now, anyway). Despite his good looks, excellent grades, and talent for sports, he's not getting any, and it has everything to do with the fact that he's impotent thanks to a traumatizing event back in middle school. Nothing seems to help, and since Viagra is apparently not a viable solution in Japan, he's practically lost all hope--until he meets underclassmen Seiji, who's violent, tactless, and says whatever is on his mind. Conveniently enough, he's also in love with Yumeji.

3. Koibito Kijunchi
Mu's in love with his best friend Maru, but Maru doesn't take him seriously because, well, Mu's a huge slut who will sleep with anything that moves. So Maru suggests an "endurance contest": he'll sleep with Mu if Mu can hold out for ten days without sex.

Amami's a low-man on the totem pole at a tiny start-up firm—and his superior Hachidori really seems to have it out for him. They've got history themselves, which helps nothing, but one evening, Amami learns Hachidori's deepest, darkest secret…which tilts his impression of the guy on its head.

This series resumed in Libre Publishing's October 2016 "Be x Boy Gold" Magazine.

The adorable Naota-sempai and the lovestruck Koharu are in trouble when they are spotted by another man! It's too much for him to handle!! There are plenty of love fool couples and hentai situations in this H rated serialization. After you've opened your heart to the possibilities, prepare your heart to be torn asunder by the unrequited romance story "At the Mercy of the Flowers" and its illustrations.

Saya and Yuuto are childhood friends and lovers. On the day of the entrance ceremony to the school where the 2 will be attending, Yuuto has become a hottie?! Moreover, for some reason, we have to keep the fact that we're dating a secret? Boyfriend with high school debut x me with a reverse debut. The life of secret lovers begins.

(Amazon) Mafia Boss Genichirou Tokada Inukai, leading Asia's largest underworld organisation, completes 108 years of natural life. His inheritance going to his granddaughter totals to 5000 trillion (5 quadrillion yen or 46,560,140,000,000.00 USD). Approximately 360 time the assets of the founder. Roughly 17 times the national budget of Japan. The desire of this unscrupulous daughter who has a non-standard financial power is to... make friends?...

(Source) What do people want if they receive 5000 trillion yen all of a sudden? A young comedy of the dark society, Chifuyu Inukai solves all things with the power of money, a comedy of unprecedented scale (of spending) in all history of manga.

Genji, a protagonist from classical Japanese literature, slips through time from the 11th century to modern Tokyo. Or more specifically, into the apartment of Fujiwara Saori!

Welcome to Nanba, the world's largest, most impenetrable prison. Locked away in cell block 13 are four inmates - Juugo, Uno, Rock, and Nico - who provide more than enough trouble for prison guard Sugoroku Hajime to deal with. Between attempted breakouts, gambling and general misbehaviour, these four believe that just because they're in prison doesn't mean they can't have fun.

But it isn't all a barrel of laughs, because our protagonist Juugo is hiding a dark past which may soon come to destroy their idyllic prison life...

A comedic 4-panel manwha adaptation of the Moonlight Sculptor webtoon, which is based on the popular light novel by Nam Hee-sung.

Fifth grader Edojou Honmaru is one of the most trodden upon losers in his class, until he meets Magical Taruruuto-kun. Taruruuto's powers help him deal with all his hardships, such as girls, bullies, and numerous other challenges.

A father-con and a daughter-con reunite after six years and try their best to be honest with their feelings.

Heisuke, a carefree high schooler with love for eating and making desserts. Aki, a selfless long-suffering cousin of Heisuke. When the two meet a heart warming story begins that will change Heisuke and Aki forever. From Bliss: Heisuke is a young man who was left in charge of taking care of his little cousin Aki for a day. Being an only child who usually stays at home alone, Aki is quiet, reserved, and will go out of his way not to make trouble for others. As they spend more time together, Aki begins to grow very attached to Heisuke, especially since Heisuke's hobby is to make sweets and desserts. The quiet Aki eventually opens up to Heisuke, and Heisuke in return teaches Aki that sometimes it's all right to be selfish and say what you really want to do.

Tights... are to be worshipped! Tights... are the universe! Tights have infinite possibilities!
High schooler first year at the height of his youth · Kamiya Oya · was suffering.
"I'm not distracted by my thoughts, but by that girl's tights! I don't want people know how bad it is."

Girls wearing tights are too cute! The inevitable comedy begins!

Contrary to what the rumours would have you believe, Lady Amelia is not very ladylike at all. Due to her wayward behavior, she is hidden away from society in order to protect her family's reputation… until a chance encounter with the Count of the neighboring estate.

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Earl Bernstein's daughter Emilia is said to be so beautiful that she can captivate men with a single glance. Many have come to seek her hand in marriage, however, she has refused all of them. In truth, she'd rather invest her time in archery and horse-riding than bridal training and sewing. One day, she meets another noble who discovers her true nature. For vague circumstances he doesn't even bother explaining before he proposes (just that his wife died three months ago), she accepts his offer to be temporarily married for a year.

Sagara becomes a girl in his third year of middle school, and has to deal with his crush on Kurosawa, a female classmate.

Includes an extra story featuring Mamiya and Miyoshi from Kanojo ni Naru Hi five years later in volume 1.
S no Kaikoroku is the extra chapter in volume 2.