Ch.1-2 - Rose-colored Research with the Flower Eater - Kuzunoha has been trying to create the "shining rose" ever since he offered one to his childhood love only to have her inexplicably eat it, but he's run out of funding. Enter Mitsurou, his new benefactor and Kuzunoha's first love in fact who happens to be a flower-eater (associated with vampires in Japan) who has always been searching for the taste of the delicious flower from that time. No trigger warnings.
Ch.3 - Congenital WILD! - Tatsuhiko has always lived by instinct, and this time his instincts are drawing him to his basketball teammate, the popular Kokami. No trigger warnings.
Ch.4 - So Happy? - Atsushi was happily married for one month before his wife left him for a host saying he was too boring. Atsushi decides to get his revenge on that host only to find that the host has misunderstood and fallen in love with him. Trigger warnings: sex work, dubcon.
Ch.5-6 - Asa and Mitya - Asa is gay, Mitya is a former delinquent, and they've been a happy couple for years now. A slice of life and how they met. Trigger warning: mention of suicide.
Barairo no Kenkyuu to Hanakurafu Kimi