Haruka's Secret Contract ~Final Chapter: Haruka~

Haruka Shiraishi, a 20-year-old second-year university student in Tokyo, loses her parents in an accident and inherits a substantial debt. To pay it off, she is auctioned at an exclusive club called "Marmaid" and purchased by a man named Shirashiro for 3 billion yen. She enters into a master-servant relationship with him and begins a confined life in his mansion. Across multiple phases of training in an alluring private space, Haruka is gradually shaped—mentally and physically—into the woman Shirashiro desires. The game progresses through phases 1, 2, 3, and a final phase, building toward a surprising conclusion about Haruka's ultimate fate.