From Visual Novel Database:
Developer and publisher: ebi-hime
Released on October 2017.
Steam trading cards consist of 5 artwork, each with a different CG in the game.
Steam profile backgrounds consist of 6 artwork, each with a different artwork sprite or part of a CG on one or both sides of a black background.
Game contains 13 CGs and an additional 8 H CGs with 18+ DLC installed. (21 altogether)
Game and soundtrack DLC contains 1 song with vocals and 18 BGM.
Opening theme Blackberry Honey on YouTube by yuzuki masu
Initial gameplay video with author narration and commentary on YouTube by Gamer Nom-Nom
Gamer Nom-Nom's BlackBerry Honey video playlist on YouTube
https://www.youtube.com/playlist?list=PLUAV6VsPWw4PnAMwDjmYDKv329k9IvlCK
Full review of game:
https://www.sinicalanimenetwork.com/post/blackberry-honey-review
Album artist Bandcamp page:
https://yuzuki.bandcamp.com/track/blackberry-honey
Steam store page:
https://store.steampowered.com/app/716340/Blackberry_Honey/
itch.io game page:
https://ebihime.itch.io/blackberry-honey
Denpasoft game page: (Contain NSFW content)
https://denpasoft.com/product/blackberry-honey/
FAKKU game page: (Contain NSFW content)
https://www.fakku.net/games/blackberry-honey-english
This one has interesting backgrounds. Almost like they were done water colors.