Succubus Research Diary

Succubus Research Diary tells the story of two women who meet by chance in the depths of an underground realm. Nerisha is a young adult succubus struggling with a fundamental problem: succubi cannot fully develop their magical abilities without sexual experiences with humans or humanoids. Unlike other succubi who enslave partners, Nerisha holds strong ideals of equality and refuses to take a non-consensual path. Serena is a mature human explorer who became separated from her expedition and possesses considerable charisma and confidence.

When Serena stumbles upon Nerisha's dwelling, the two women learn of each other's circumstances and negotiate an unusual arrangement involving sexual encounters. The game explores this intimate relationship while examining the broader cultural tensions between succubi and humans. The main story contains approximately 97,000 words spanning 6-8 hours of gameplay. Post-launch updates added Serena's Services, an additional story arc lasting about 2 hours and introducing three new characters.

The game features 34 unique event illustrations with 307 total variants. Main story sex scenes include five stages with unique dialogue options. Players unlock additional intimate scenes through in-game actions and research progression. The narrative takes place in a female-centric fantasy setting and includes both female x female content and optional futanari x female scenes.