The Passion of Sister Christina

An Exploration RPG with Plenty of Sexual Harassment, Featuring a Sister Who is Weak to Pressure and Gets Swept into Erotic Situations.

The protagonist Christina is a sister who lives in a church with her stepfather, a priest, and her stepsister, Liz. One year after her stepfather went missing, a merchant suddenly showed up and declared, "You must repay 1,000,000G debt in 30 days." And thus began Christina's suffering.