Um, many of you seem to think this is the first chapter of a longer-running series... but, actually, that's not the case.
The Jingai Yuri Anthology books are made of oneshots. Each volume has a number of autoconclusive short stories with no subsequent chapters intended. There are 2 books out so far:
Cinnamon Nonhuman x Human Yuri Anthology
Story 1 Birds singing at night (Neji)
Story 2 My Sister is a rotten girl (Asagao)
Story 3 The demon lord of the house (Eku Takeshima)
Story 4 Love Demon (Jin Takemiya)
Story 5 Wild Baby (Saki Amano)
Story 6 Flower room share (Sekihara)
Story 7 Confession (Mizua)
Story 8 My Housemate is a fish (Saku Takano)
Vanilla Nonhuman x Nonhuman Yuri Anthology
Story 1 Demon and Yamagami
Story 2 More than one zoo bar (Mintaro)
Story 3 Ginger Bride (Kazutaro)
Story 4 12th floor (Nagu Tsugu)
Story 5 "I wish I could" (Mizutani Asuza)
Story 6 Grim Reaper and indigo dying candles (Shin Takekawa)
Story 7 Kisses in Wonderland ( Subaru)
Story 8 The Devil's Daughters (Mochi Ore)
Story 9 Alice please, I'm worried about you (Hachi Ito)
As you see, this is story 6 in the Vanilla volume: Grim Reaper and indigo dying candles, by Shin Takekawa, which was translated under the title A Candle for the Grim Reaper. There isn't any continuation, what you've read is all there is.
(Of course, some editor could eventually like it and decide to turn it into a longer series... but I wouldn't bet too much on it.)