https://store.steampowered.com/app/1340140/DRACURIOT/
your usual
NekoNyan + HIKARI FIELD combo
it is possible a offsite patch is needed

The developers describe the content like this:

Adult content includes a few illustrations with revealing outfits and kissing.
Characters enter a relationship that is not shown on screen, but acts of which are brought up in conversation.
Also, every appearing character is over 18 years old.

New to this port is 1440p compared to original 720p + build in chinese+english+japanese script