The virgin elder brother, Okada Naoto, and the younger sister who's unware of the concept of chastity, Machi.
Machi, who often teases her brother who's never been able to get a girlfriend, and also a virgin of 20 years, with offers to fondle her boobs.
While the dominant one in the Okada family is Machi, the one that she's obsessed with is...?
(Watch the healthy brocon/siscon relationship that these high schoolers have in this ominibus of home and school life!!)

After visiting her deceased teacher's grave, a guy suddenly falling of the staircase where Asahi Sena ended up saving him. That guy, Itsuki Tobari turned out to be her deceased teacher's younger brother. They started to talk about things from the past, about the dead of Itsuki's sister and an 11-year-old boy who killed her, who was Sena's bestfriend. What happened to the boy who killed her now? Together, they start to find out what did actually happen during that tragic day.

From Fantasyshrine:

Shou works as a photographer’s assistant in a studio. He's approached by Amamiya, the Chairman of an influential production company, to become a model. Annoyed by Amemiya Tsukasa’s arrogance, (yet unable to resist a challenge), Shou accepts Amemiya’s offer. But then Amamiya orders Shou to live in his apartment, so he can personally train Shou to be a top model. But what does the training entail...?

Romance of an elite company president and a Cinderella boy.

With The Master Till Dawn: Rin, Amamiya's bratty cousin, is in love with him. What Rin doesn't know is that someone in his house hold is in love with HIM.

A 17 Year Romance: High school friends discover new feelings for each other after 17 years of friendship.

Anywhere With You: Secluded rich boy with health problems is in love with the delivery boy who sometimes comes around.

The Serious Player: A bisexual playboy always teases his gay virgin ice queen of a coworker.

Meet Kageno, the super dull, glasses wearing, short first year high school girl. She has no friends and envies people who are enjoying their youth. Meet Mitsunaga Youta, the most popular handsome guy in school. Girls constantly confess their love to him, but he has no plans of dating anyone. After a string of events, he decides to ask Kageno to be his fake girlfriend for a month in order to stop the girls from confessing to him in exchange for his friendship. How will Kageno face all the ordeals that are about to come? This is the start of a love comedy between the school idol and the negative girl.

Yurika attends a girls-only college with a long tradition of lesbian love, and according to rumors, she's been with over half of the 10,000 girls who attend the school! This rumor is mortifying to Yurika, and seriously damages her chances of ever getting a boyfriend. The truth is, for some reason, she's just completely irresistible to women, even women who claim to be straight. One day, Yurika gets a call from her Dad, letting her know that his company is bankrupt. He suggests that she get by on her charms, since he can no longer help her with money. Is it time for Yurika to actually start taking advantage of her unwanted persona as a masterful lesbian lover?

"I want to change" Sakura, Tsuchigure, who entered Sendai Hoshimi High School, had a secret that her friend Karen could not tell. That is the creative activity of "drawing a manga." ...Sakira was giving up her creative work for a certain reason, but her encounter with "high school drama" changed her daily life dramatically. --- Now, the curtain of the youth group drama that everyone shines is up!

Made by the author of I Don't Know What My Little Sister's Friend Is Thinking!

Author's Twitter: https://twitter.com/rayrei1414

Yamada is the plant appointee; tending the school's garden of flowers on her own. She isn't the slightest bit athletic, she's actually quite clumsy. However, that doesn't stop her from having feelings for the star athlete in the class next-door, Kase-san. Slightly shy, Yamada is reluctant about her feelings for the enthusiastic Kase-san. Slowly but surely, the pair are helping each other to grow in confidence for both themselves and their budding relationship, each blush and brush of the hand at a time.

Seven Seas Releases:
Vol. 1 - Kase-san and Morning Glory
Vol. 2 - Kase-san and Bento
Vol. 3 - Kase-san and Shortcake
Vol. 4 - Kase-san and Apron

After failing the first blind date in his life, Oh Do-Kyung calls the friend who arranged the date. He's in the bathroom. During their conversation, his friend says something which angers Do-Kyung, which leads him to accidentally shouting his secret. His secret is that he is gay. To his shock, he realizes that there are other people in the bathroom: friends from his college department and even a senior student that he is on good terms with. Worried about whether or not they heard his secret, Do-Kyung's life completely changes.

Takasugi Koyuki who is 180cm, gloomy and shy is secretly fond of Komaeda Masakatsu, who is short in stature but has a big heart. Will the distance between the two obvious mismatch be shortened---?!

1) Boy’s Lips
Narina accidentally kissed a sleeping boy in their school clinic and now she can't get him out of her mind. She later learns that his name is Yasuda and sees him roughed up. When they meet again, Narina is startled by Yasuda's kindness. But before she can figure out her feelings for him, Narina sees her teacher, Sugiyama, warning Yasuda off her. How will she be able to handle the situation, especially now that she knows that her teacher has special feelings for her?

2) Boy Poisoning
Harada Sayaka bought a potion from the neighboring boys school's chemistry club, which they no long make. Unfortunately for her she has become addicted to it. Leaving her to chase after one of the members, Fujikawa Shuujei, to get him to produce the main ingredient... his tears. Which, obviously, he is not too keen on doing.

3) Electrocuting September
Kayama is the last of the class to experience Koba's exciting talent, and the class is taking bets to see how long she can resist it... the electric shock of the cold and collected Koba.

4) Emerging Cicada
The story of two boys, Shin and Kazushi, who are both hospitalized around the same time for different reasons.

In a world populated by anthropomorphic animals, herbivores and carnivores coexist with each other. For the adolescences of the Cherryton School, school life is filled with hope, romance, distrust, and uneasiness.
The main character is Legosi the wolf, a member of the drama club. Despite his menacing appearance, he has a very gentle heart. Throughout most of his life, he has always been an object of fear and hatred by other animals, and he's been quite accustomed to that lifestyle. But soon, he finds himself becoming more involved with his fellow classmates who have their own share of insecurities and finds his life in school changing slowly.

Note: Won multiple awards in 2018 (the Tezuka Osamu Cultural Prize, a Kodansha Manga Award, and a Japan Media Arts Festival Award)

Kayano Meguru has a bit of a brother complex. Her love for her brother is so strong that she has removed the idea of any romance with any other male other than her brother from her mind.

One day she passes out and awakens 2 years in the future! To make things even more confusing for her, she is dating someone other than her beloved brother!

Year 2055, 4 years after the events in Danball Senki W. LBXs have become the world's largest hobby, big enough for pro leagues to be established, and people to make their entire living off being an LBX player. 14-year-old Arata is a new transfer student at Kamui Daimon Integrated Academy on Kamui Island, near Japan. Known to be the most prestigious institution in the world for raising LBX players and mechanics, entrance to the academy requires an extremely competitive hurdle of being the champion of at least 3 official tournaments. Along with other members of his platoon, they face rivals and delve into the secrets lurking within the academy.

"Sex" made more familiar!

Health and physical education teacher Tsuji, who has doubts about modern sex education, attempts boldly to teach sex education to an audience of, among others, a girl who has a girlfriend, a girl who like BL, and a girl who simply likes cats.
"What is safe sex between girls?" "Positive masturbation?" "Why do sugar gliders (Petaurus breviceps) have vaginas?"
Beyond dirty jokes, but less than gravely serious, a sex education comedy!
Bright sex education begins with a heretical female teacher and female high schoolers!

In the summer her grandfather passed away, high school girl Kiyoi found herself abandoned. To protect her home, she decides to marry that man…!!

V. Koibito no Namae

1. Lover's Name
One night, Ei Ariga the private detective was hit on by an obnoxious stranger whilst out working on a case handled by his father's agency. Then the timid and very polite Ryouichirou, who is a dead-ringer for the playboy stranger, turns up at the agency and tries to engage their services to find out why and how someone is breaking and entering his apartment. Ei-kun discovers that the nasty, violent and annoying carbon copy is called Naruaki and things get extremely complicated when he starts falling in love with both Ryouichirou and Naruaki... Lover's Name is also found in Double Lover - Koibito no Namae

2. Saikou no Kimi
The oneshot is also found in Saikou no Kimi.

-----

V. Double Lover - Koibito no Namae

2. Kimochi no Yukue
It's been three years since Kirima walked away from his relationship with Kou. Kou's obsessive love was what sent Kirima running in the first place, and now that he has Kirima back he's not about to let him escape again...

Tachimori Ashita inherited the Tachimori Mansion when his parents died in an accident. Originally owned by his great grandfather, the estate has been traditionally an inn that had many people living in it but, as of lately, it has become vacant due to Ashita losing his parents. As Ashita tries to revive the mansion in remembrance of his parents, he is surprised by a young girl looking vampire named Noi and her servant Sesera who claims to own the place.

According to Noi, she lent the mansion to Ashita’s great grandfather in return for maintaining the building until Noi returns. As a vampire, Noi has super strength, the ability to turn into mist and can cast various spells. She has a powerful dark aura that attracts evil spirits and, because of that, Noi has had to constantly be on the move. But because of that, she has been abandoned by her family and friends. Ashita decides to let Noi and Sesera stay and is determined to start a new chapter in the Tachimori Mansion history.

Rin had quit calligraphy after her mother's death. Then upon seeing the calligraphy of a high school calligraphy masters, Uchida Dougen, she started learning again. Rin entered the same school as Dougen and the current calligraphy club or more like Dougen fan club. When the student council president announced that the club would be disbanded, Rin had to take action to keep the club going. Dougen, who had come to support the president, ended up joining the club because Rin's word sparked his interest. Unbeknownst to her, Dougen is somewhat of a playboy. What will become of Rin and her beloved Calligraphy club?

An accidental meeting brought the lonely Su Ye and the perfect prince Zheng Shu together which created brand new feelings. The interaction and feelings between the two were originally familiar made their heart beat. Can there really be a pure friendship between a male and a female?