From DMP:
Nakagawa and Yokota are two boys very much in love with each other. Yokota is more open with his feelings, but Nakagawa is easily embarrassed of public displays of affection. Though they may be outwardly different, their feelings for each other are the same...their connection is such that they liken themselves to Dousaibou Seibutsu (Same-Cell Organisms).

Contains the Stories:
1. Same Cell Organism
2. I Love You
3. Lullaby in My Hand
4. The Letter in the Attic (Yare Ura Yuubin Monogatari)
5. To Make Angel (Tenshi wo Tsukuru) (Prequel)
6. To Make Angel (Tenshi wo Tsukuru) (Sequel)
7. We Selfish Two

Yoshinatsu is a one-shot about a friend that will not be forgotten.
(Source: sumomoyumeka.livejournal.com)

A short story about schoolboys love....This kind of makes you feel alive.

Pinky promise. If you lie then you have to swallow a thousand needles and your finger will be chopped off. Kiriko is a little girl who makes pinky promises with various people who expect her to pay for them, looking forward the day they run out of fingers to make promises with or break their promise. An adorable yet creepy 8 page oneshot.
(Source: Psycho Pandas)

Adults--they just don't get the pressures of being babies! Thoughts on growing up from the Kindergarten of Evil students.

The flower in Itadori will bloom in the summer, taking his life as it took his sister's but giving others longer lives, but how can he leave his childhood friend Rakka behind...?

A sweet story about friendship and young love.

[From Storm in Heaven]:

This volume contains four of Yumeka Sumomo's short stories.

1) Natsukashi Machi no Rozione : a young woman struggles to realize the value of her childhood.

2) Icchoume Kikyouya no Hime-sama.

3) Boku no Shalala: about witch Shalala and a human boy

4) Robot: Sci-fi romance.

A heartrending and heartwarming story about two twins: one who hates everything like himself and one who wishes to keep his promise from long ago.
(Source: Psycho Pandas)

A short oneshot about someone who is taken in from the cold by the only person to notice him, a young man named Taiyou.
(from Psycho Pandas)

Compilation of short stories.
1) The Day I Become a Butterfly
There is a rumor going around school that Mikami can “hear” when one’s death is near. Uka has just turned fifteen, but doesn’t know how much longer he’ll live… Will the budding love between Mikami and Uka have a happy ending?

2) You At the End (Hate Ni Aru Kimi)
A short story about a guy sick of this world and the silent, unlikely boy who anchors him to it.

3) The Lonely War
Can men and women have platonic friendships? Suzu is determined to try.

4) Blue Cat's Tunnel
A story about one girl's hope to find a way out of her life...

5) Tokyo Alien Yulala
A young student's trouble understanding his classmate makes him think the boy may be an alien.

6) Planet Yours
An abused boy has trouble relying on his friends.

Note: stories 1, 2, 5 & 6 are shounen-ai, stories 3 & 4 are shoujo.