An Adult-Only (18+) short and linear story with tentacles.
https://store.steampowered.com/app/1032020/
https://store.steampowered.com/dlc/1032020/Shantalia_and_Coralihulu/
The bundles (they may not be available worldwide)
https://store.steampowered.com/bundle/10211/
https://store.steampowered.com/bundle/10041/