From Yuuki Megane Scans:

Shuuhei, Harumi and Daiki start their second year of high school with an absolute goal: Getting at least two new members for their swimming club to keep its position as a club. This is the daily struggles and shenanigans of a high-school boys' swimming club!

In the Danna-sama to Mitsugetsuchuu series:

V.1 - Danna-sama to Mitsugetsuchuu
Sakuya and Shuji-san are enjoying their 'newlywed' life to the fullest. Although Sakuya was brought up as a 'young master', he's still wants to try his best for his loving husband Shuji-san.

V.2 - Toro Toro Honey Hen
Shuji takes Sakuya on a onsen honeymoon trip; when they get back a servant from Sakuya's house has found them. Will they be able to keep living together?

From Day of the River: “The person who killed my father...is among these people.” 15-year-old Kotobuki Ringo reunites with childhood friends she hasn’t seen in eight years since her father passed away: the calm and soft-spoken Shiran, the strong Kujyaku, the kind Masaki, and the energetic Gogyo. They were all students of Ringo’s father and all have amazing abilities of their own. Ringo comes to live with them at Shiran’s villa, but she’s not staying with them just to rekindle their friendship... She believes that one of them may be her father’s murderer, and she will stop at nothing to find out who was behind her father’s death.

1. Makka na Tulip wo Kimi ni (Red Tulips for You)
From Delish Scans:
Red tulips for you, and you, and you.

2. Nostalgia
3. Kinmokusei
4. Yume no Hanashi

5. Dandan (Warmth)
Matsuki and Nishimori have been best friends, but when Matsuki develops romantic feelings for her, he decides to confess. His unrequited love means little to Nishimori because she doesn't see him the same way and she's perfectly content with the friendship they have now. Can the flames ever be rekindled or will it remain cold?

6. Makka na Tulip no Hanakotoba

It opens when a mysterious strangely dressed person who the kids mistake as a new transfer student enters a peaceful classroom. Much to their surprise he is their new homeroom teacher, among other things…

— By the author of Saiki Kusuo no Ψ Nan

From Yen Press:

Shinji Souda's not exactly happy about his family's age-old marriage customs, namely the fact that he has to marry a boy! Will a sudden confession from his bride-to-be, a beautiful boy in his class named Aoi, make Shinji change his mind? This sweet love story follows the couple through their marriage ceremony, wedding night, life as newlyweds, and even childbirth! The title story in this compilation is the prequel to Mr. Flower Groom, also being published by Yen Press.

N/A

Contains 9 stories pertaining to love and friendship.

1. Kimi no Nokosu Toumeina Ao
Two friends spend their last summer days together before one of them moves to a completely new town and school.

2. Okama Kata Emban
A student secretly pines for his teacher. A fellow student advises him to confess, but with graduation fast approaching, he might not make it in time.

3. Hole Memories

4. Promise

5. I'm Real

6. Daisuki Daisuki
A clumsy and highly optimistic student develops feelings for his classmate. While he thinks there is absolutely no chance, it may take an unexpected event to prove otherwise.

7. Nearly Drowning My Honey~

8. Sweet Harvest

9. Confession Day

Kai was living a peaceful and secluded life with his special martial arts teacher Gankutsuo, until the day he rescued a beautiful girl, Lee Shuurei, who was tumbling down a waterfall. He has no idea what she means when she asks about a "Tenraimon", but Kai is soon drawn into her problems when her pursuers arrive. Meeting her will change the course of Kai's life!

There's a new girl in town called Dahlia, who attends an elite high school. She's hated by the other girls. They think she's stuck up, but they also suspect her of committing the murders in the neighborhood.

Dahlia is a vampire, with one eye that turns green when her vampire nature awakens. She came to this area to search for her lost love, who also is the one who made her into a vampire. She attends the same high school as a young man who resembles her lost love. Maybe it's him. She's going to find out by awakening the boy's memory of his past.

Consists of (Hakusensha bunko ver.) :
- Yumemushi, Hitsujigusa : divorced wife and her little daughter
- Mizumakura Hanemakura
- Kaisoku Hansen
- Summer Time : A young man, about to be married to his childhood love goes to look for his best friend who was supposed to return to the small village for his wedding from Tokyo. When the young man arrives, he finds a note left by his friend and the presents he would have brought. The note refers to a night when there was lightning and rain, cutting off the power in his small village. Was it really lightning?
- Non Regart
- Dahlia no Obi
- Rangiri Ninjin

From Dan of Population GO:

Ooba Asa woke up one morning and became an invisible man. It isn't just him, but various students around school have been gaining superpowers while his little sister has been losing the same powers. Supposedly the student council president is giving out superpowers, Ooba Amime's powers, so Asa, Amime, and the grudge-filled flame girl, Daimon Yaki, form an uneasy alliance to give the mysterious student council president.

Daria is a relatively normal girl, despite the fact that she always seems to be the recipient of miracles. But when a strange character appears suddenly, with the intention of keeping his promise to kill her, her average high school life becomes anything but...

Oneshot from Uchuu no Hito

A vampire, a werewolf, and a Frankenstein monster live in a castle apart from humans.

Naruyuki Touya, young student, arrives at Amagiri Gakuen, his new highschool. He finds himself on the quay of the station faced to a robot out of control and is attacked by a girl and then a classmate.
Who are they? How come the girl knows his father?
And what is the connection with him and this highschool?

Invaders from an unknown dimension prey on the loneliness of the human soul. The only thing between them and the success of their diabolical plan is 4 youngsters with powers to rival the invaders!

From Forbidden Garden:

1) Cream Caramel
Because her parents are transferred away due to their jobs, Mikoto, a grade 11 student, starts living alone on 100,000 yen per month. But the place she lives at is a horribly old apartment... And the one living in the room next to hers is a super cool boy...?!

2) White Summer
Mana and Shou have to go their separate ways after graduation, will they be able to stay together when they're hours apart?

3) There Are Days Like That, Too
Sonomi has been in love with Ikuta-san since she was in the seventh grade, four years before this story takes place. Ikuta-san suddenly starts working at her uncle's cafe, and it seems like Sonomi might have a chance to be his little sister, since he's been going out with another girl for those same four years that she's loved him.

This is a compilation of short stories from all over the time line. It's got stuff from just after Recca ended, some things from the MAR days, and then some of his debut projects as well.

About a boy of thirteen years who always tries to be a hero and for various reasons are involved with monsters, ending in his death, but it revived with the help a little thing (one might say that is the predecessor of innocence) and now must fight the Count ancient.