Sex Trainer's Diary: Hidden Kink is a story-driven visual novel with elements of simulation and stealth, in which you investigate the mysteries of a mysterious girl named Mio. After receiving an unusual commission, the protagonist finds themselves drawn into a story where each new event gradually reveals the heroine's character and her hidden desires. As you progress through the story, you unlock new scenes, learn more about the characters' pasts, and influence the development of their relationships. Secrets, observation and choice In stealth sequences, you must follow Mio stealthily, using cover and the surrounding environment to avoid her notice. Any mistake will lead to mission failure, so you must carefully monitor your route and use the environment wisely. A free mode complements the gameplay, allowing you to explore the world and unlock additional events. In addition to stealth, significant attention is paid to story scenes and interactions with Mio. Conversations, visiting the store, and searching for new items gradually unlock additional episodes and allow you to delve deeper into the heroine's story. The combination of several game modes makes the gameplay varied, and the unfolding plot constantly motivates you to uncover the secrets hidden behind this unusual mission. Features of the game A visual novel with stealth and simulation elements. Stealth pursuit using cover. Free exploration of the game world. Non-linear plot development and additional events.