In Living with Sister: Monochrome Fantasy, players take on the role of a budding adventurer who balances quests for the Adventurers' Guild with managing household responsibilities, particularly caring for a sickly sister. The gameplay involves hunting monsters, honing skills, and making choices that affect relationships and story outcomes.

The storyline follows the protagonist's journey to become a renowned adventurer while navigating the challenges of daily life and familial obligations. Players strive to achieve their dreams amidst the backdrop of a vibrant yet monochrome fantasy world.

Living with Sister: Monochrome Fantasy stands out with its hand-drawn monochrome art style, which creates a visually striking experience, and a unique combat system that offers a variety of skills and challenges, enhancing the overall gameplay experience.