Steam: https://store.steampowered.com/app/2656420/Knightess_in_Debt/

itch: https://noxurtica.itch.io/knightess-in-debt

Newground (Demo): https://www.newgrounds.com/portal/view/903623

Synopsis: You are a gambler that earns a living through the popular card game, Magino. One day, your childhood friend, a knightess, accrues a deep debt to a criminal organization after losing several games of Magino. You take on her debt and now must pay it off by the only way you know how, gambling in Magino. In the meantime, your friend tries to make it worth your while and shows gratitude in explicit ways.