Porn Game: Summoner Veil - Stay Nights Crisis Final

Overview:
Leona Warcurst is on her first mission as a knight.
"Ryukke's monsters are weak so give it your best, you'll do fine."
At the urging of her brother Leona heads to the remote town.
For his respect as well as her own growth,
she's eager to relieve the troubled people of Ryukke.
Unfortunately, it's so remote that the men crave any entertainment.
Perhaps it would be better if she'd never come...
But her mission is the same: to relieve the troubled people.​

Summoner Veil - Stay Nights Crisis Final game preview

online.