From ShoujoMagic:
A collection of short shounen-ai stories by Mizushiro Setona, all connected by the theme of plantlife.
[STORY 01] (English Title) Breakfast (Japanese Title) ブレックファスト (Romaji Title) Burekkufasuto: The tale of a boy who displays the symptoms of man-eating syndrome.
[STORY 02] (English Title) The Tale of the Ring (Japanese Title) 指輪物語 (Romaji Title) Yubiwa Monogatari: The tale of two boys who are dating each other and mutually hiding the fact that both are dating their teacher, who frets because a ring has been lost.
[STORY 03] (Japanese Title) Honey β: The tale of a flower that blooms by inhaling memories. But even if our memories are taken from us, some precious things are never forgotten. "I don't fear losing my memory if I can feel this way again tomorrow..."
[STORY 04] (English Title) Undying Illness (Japanese Title) フジノヤマイ (Romaji Title) Fuji no Yamai See "Mister Mermaid," story 2.
[STORY 05] (English Title) Aconite (Japanese Title) トリカブト (Romaji Title) Torikabuto

“The first person to cause me sorrow was of my own gender.” Tsubaki gets hurt by his classmate Kaoru, and Koutarou by his kind older brother. Yet, in their hearts, they still hold longing and deep devotion. Passion, heartache, despair, sadness… Loving with body and soul, this is the real life story of these boys.
(Source: Jmanga)

From ShoujoMagic:

Story 1: Automatic Angel
Serika, a high-school student, is known for being a well rounded girl with an attractive face and figure. She is clear-headed and has a talent for sports. But she's an... android!?

Vol. 2, Story 2: The Winter Was Trying to End
Tale of a high school professor and student.