In a certain star system, there is a small planet called the Onsen Planet. The entire surface is covered in hot springs, and the ones who manage them are the 4 Santa Monica siblings.

A classic manga about girls at a private all-girls school. The storyline centers around the experiences of Nanako, a "normal" girl who is invited to join the prestigious school organization, the Sorority, and is resented by all the other students because she doesn't appear to be qualified. Other key characters are Nanako's two friends: Tomoko, her friend since childhood who is alienated by Nanako's decision to try to join the Sorority, and Mariko, a strange, obsessive girl who is invited to join the Sorority along with Nanako; her "older brother," Henmi, who she corresponds with by mail; and the "Three Magnificent Ones," all of whom are admired and quasi-worshipped by the rest of the student body: the head of the Sorority, Miya-sama, the haunted, pill-popping rebel, Saint Juste, and the star athlete with a mysterious disease who doesn't like the Sorority, Kaoru-no-kimi.

Contains an unscanlated oneshot in volume 3: Early Spring Trembling.

From Aerandria Scans: My mama is in heaven, but...I have my big sister!! Hinako is a high school students who has a lot of things that she wants to do, but for her cute little sister, she will become a mother!

Taken from VIZ:

Kosaku Hatanaka is the first pro boxer ever produced by Mukaida's Gym. He's also the bane of his coach's existence. Although he's constantly waging war against his appetite, Kosaku never met a meal he didn't like! Naturally, this plays havoc with his weight class. Junior bantamweight, bantamweight, junior featherweight... every time he moves up a class, his coach's hopes plummet. Isn't gluttony a sin?

Sister Angela is a young novice nun who's dedicated, passionate, and convinced that we should give peace a chance. Although she refuses to acknowledge it, it's obvious that Kosaku comes to St. Mary's for more than confession! He comes to see the smile of the beautiful sister, of course! Can her faith redeem the gluttonous appetite of the tempted lamb astride the scale?

Minato’s father is androgynously beautiful. But unfortunately, his beauty outranks his IQ.

Not only that, his flashy sense of fashion also makes him look like a flamboyant member of a local host club. Nevertheless, his fatherly love for his only son knows no bound! And today, he is going to annoy his son energetically to no end, yet again…

Absurd father-and-son comedy duo BEGIN!

— Nekyou.com

Story 1. Boy Next Door
Takeshi is straight until he sees Kazuya lying naked on his friend's couch. After their intimate encounter, can they find a way to make a relationship work and manage to survive on their unusual part time job?

Story 2. One Heart
A story about a part-time, student worker and his ex-salaryman boss. When his boss's company is in danger of going bankrupt, how will the part-timer convince his ex-salaryman to take a loan from him?

Story 3. Otoshimono
An odd encounter between two strangers results in tales of violence of questionable validity--and of course sex. But is this just a one night stand?

Story 4. Long Way Home
Katou has money problems, loans and he hasn’t paid his rent for 5 months now. When his realtor Yui suggest that, if Katou does a job for him, he will give him 3 more weeks to pay the rent (before kicking him out or worse), Katou happily agrees… (Yui appears also in Night Walk)

1-2) On the Quiet
On a cold winter day, when Ikewaki Kou, a college student, forgot his key and couldn't enter his apartment, he was invited into his neighbour, Shiraishi Hiroya's room. But the room was so dirty that there wasn't even space for him to put his foot down, and Kou was really shocked by this gap from his neighbour's orderly image. Even so, Kou remembers the steady palpitation of his heart as he conversed with the bashful and unaffected Shiraishi. Things got heated when Kou realised that Shiraishi might like his brother instead.

3-4) Tangerine Report
Nakatani is a nice guy... to everyone else in school. For some reason, he seems to hate Ikeuchi. What could be the reason? Ikeuchi finds himself drawn to Nakatani after seeing the sunlight turn his hair a beautiful color, along with an arousing desire to touch him.
"I always smile gently, because I'm scared of being shunned." Part two is told from Nakatani's point of view.

5-6) Unreasonable Baby
Sugimoto, from Tangerine Report, is back with his own story this time. He took his friends' gay relationship very well... but why? It turns out, he's had some experience himself... with his senpai Kotegawa.
Second part told from Kotegawa's point of view.

Oshaberi na Jikanwari is based on Mizusawa Megumi-sensei's own love story. It is the story of how she had a crush on a boy since primary school and the events that took place while she goes from primary school through junior high to senior high.
(From Esthétique)

Includes a side story about one of the main character's friend, Satsuki Goto, and several oneshots by the author:

The Message
Akari has been keeping a secret from her friend and crush, Wataru. In the spring of 10th grade, she found a tape of Wataru confessing his love to Yayoi, and even after knowing Yayoi had feelings for Wataru, she still hid the tape! Now, two years later, the Akari and Wataru pleasantly bump into Yayoi again...

Landscape of the Second Year
Soko, a second year college art student, is still secretly struggling with her past breakup, but with the help of Kando, overcomes it.

N/A

Rocky Bordero seems to be an average kid who ditches school for the internet café. But what lies underneath is a powerful creature that comes out whenever he activates his weapon.

Join Rocky on his quest as he finds a way to post on his social media account while searching for the person who gave him the weapon.

Six months ago a book store manager taught high-school student Minami a lesson about loitering and gave him a job. Since then Minami finds himself slowly falling in love with his strict and sometimes violent manager.

A young girl, Onaga, discovers her neighbor, Kashiwabara, in his balcony one hot summer night, dressed up in women's clothing. A unique relationship between them ensues. From the mangaka of Aku no Hana (Flowers of Evil) and Happiness.

Yoshimi, who has a strong attachment to food, meets the resourceful lunch box boy, Endou. As he is being fed, a strange desire began to grow...

Collection of 23 stories about love in the everyday life of the Japanese.

1. His Scent
A woman reflects upon finding the scent of her lover from two years ago.

2. Heavy and Pop (♂)
A broke youngster starts selling him to an old lady.

3. Painfully from the Heart
Showing the connection between pain and love

4. Holiday
A woman spends a day at home with her depressed boyfriend.

5. Heavy and Pop (♀)
A prostitute thinks about the concept of love.

6. A Place One Likes to Return To
A young woman who meets her ex-boyfriend and has sex with him gets confused about feelings for her current lover and her ex.

7.-8. The Silent Radiance
A girl unexpectedly meets her old womanising crush.

9. Small and Lovely
An Office Lady fed-up with her surroundings looks forward to meeting her darling.

10. At the Park
Two best friends, one of them whose name is Yoko, spends time with each other as they set of fireworks at the park, but there is a meaning behind their get-together. What is the reason for it?

11-12. The Truth Behind Things
13. Almost a Weding Proposal
14. The End of a Friendship
15. My Life - First Example: Chikada
16. Kyoko
17. That Afternoon
18. My Life - Second Example: Sawa
19. My Life - Third Example: She

20. Holiday Part 2
A girl reads a shoujo manga and is left unsatisfied by the ending.

21. Sweet
A girl reflects herself cheating on her boyfriend.

22. Painful Love III
A young man is forced to choose who he loves more. his girlfriend or the girl with whom he's having an affair.

23. The First Time

From Attractive Fascinante:

1. I'll Deliver It
Aogaki Kouhei, a famous designer, was kind to everyone else except to Hasegawa. The weird thing was, he always gave Hasegawa expensive desserts. Hasegawa felt puzzled, but gradually fell in love with the arrogant man. While making a delivery to Aogaki on a rainy day, Aogaki dragged him into his house to wash his feet for him. Did Hasegawa have a special place in Aogaki's heart too?

2. The Other Side of the Porch
Ootomo has fallen for his neighbor, Ichikawa. The two university students attend different colleges and only meet each other once in a while outside the apartment, but will Ichikawa's little white cat help them become closer?

3. Satisfaction
Tall, studly university student Takeuchi Tomoe notices a slim classmate peeking at him whenever they pass each other in the hall. A friend later tells him he saved the pretty classmate, Shibata Daiki, from falling a while back. Takeuchi realizes he is abnormally bothered by Shibata's presence when a part-time teddy bear mascot working at his parents pharmacy reminds him of Shibata... unless there's more to that suit than Takeuchi can see.

4. The Beginning
After getting smashed at a business drinking session the night before, Atsuhiro wakes up in a foreign room to find his business client sitting on top of him. Matsukura (the client) tells Atsuhiro that he brought him home and was raped by him. Atsuhiro is horrified that he could do something like that to Matsukura... but then a second Matsukura walks in saying none of that really happened. Why are there two of them, and what really happened last night?

5. The Depth of Love
The older-brother's-friend story. Harigaya Kenichi is the junior of Ryou's nii-san. Ever since Ryou was little, Kenichi has been harassing him. Even now, when Ryou's in high-school and Kenichi is a car dealer, the unpleasant teasing continues... but perhaps it is the old "tease the one you like" routine?

6. Turnaround Time
Ookubou used to live near Shimotori... now Shimotori just transferred to work at the hospital Ookubou works at. A reunion after so many years should be joyous... but why did it end up like this?

7. 8 Mats of Suite
Rintarou was kicked out of his house by his mother... now he's living in a tiny, dismal apartment. The only thing that makes it alright is the neighbor and his college classmate, Ono.

8. Do Me a Favor
Follow up of story 1.

Akira was living happily with his mother and younger brother, when tragedy struck. In the wake of his mother's death, Akira's estranged father refuses to show up for the funeral - after all, she is a mere mistress, and he is head of the powerful Kasuga Corporation. Instead, Akira's father sends Hyougami, his right-hand man, to retrieve two sons he's never seen before.

Dragged away with his brother to live at the Kasuga estate, Akira tries to break free from his father's tyranny and Hyougami's advances. But his every effort is thwarted by the money and power of the Kasuga family. Soon, Akira realizes his well-being is controlled by the whims of Hyougami. His father's man is used to getting what he wants, and Akira is number one on Hyougami's list!

Is Akira willing to sell his body for security? Does he have a choice? Or will he find himself actually falling for the cold, ruthless and mysterious Hyougami?

Otsu Hiyori's two-part one-shot "Othello" is about two girls who are opposites.

Yoshino moves into a building owned by his college friend, Kuga. While hanging out with him, he starts to admire Kuga for his decisive lifestyle and openly expresses that awe. But Kuga's feelings towards Yoshino are a bit more complicated than that.