A collection of four one shots, one for each season.
1) Overhearing a Flower Song
2) Into the Forest of Fireflies' Light (Hotaru no Mori E)
3) The Fallling of Autumn Leaves
4) Deepening the Scar
(Source: MU)

Karashima is a high school boy with a beautiful voice. So beautiful that he can make anyone do anything, just by saying the words. Because of his potentially dangerous ability, he distances himself away from people but soon finds himself in the middle of various criminal investigations that he can help solve, and a girl named Kokubu who seems in love with him.

Volume 2 contains two one-shots, Hana
Dorobou and Kouhii Hirari.

Takashi Natsume can see spirits and demons that hide from the rest of humanity. He has always been set apart from other people because of his gift, drifting from relative to relative, never fitting in. Now he's a troubled high school student who has come to live in a small town where his grandmother, Reiko, grew up. And there he discovers that he has inherited more than just the power of Sight from the mysterious Reiko. When Reiko was Takashi's age, she bound the names of demons and spirits in her Book of Friends, enslaving them to her every capricious whim. Now Takashi is the owner of the book, and the creatures will do anything to get their names back.

(Source: Viz Media)

A collection of four oneshots.

Summary from Ochibichan:
When Kunuyoshi was on his way home, he saw honor student, Ikeda, in the river looking for his notebook. Then, the girl who picked up the notebook, Murozono appears and she has come to know about the ‘murder-plans’ written in it… Also contains earlier one-shots by Midorikawa Yuki- Flower’s Marking, Cold Day like Before and Nameless Guest.