You are a young woman, wealthy and living in luxury. However, there is a dark side to you that only you understand—the suffocating loneliness and boredom that come even though everything seems perfect. To fill the emptiness, you have an unusual hobby: sailing alone in the middle of the sea at night. For no clear reason, the nights provide a sense of freedom that you’ve never found on land.

One night, while sailing, you see something that captivates you—a beautiful creature with large, shimmering fins and a face you can’t quite describe. It’s a mermaid, Thalassius. His body is large and muscular, yet his face carries a captivating beauty, creating an attraction that’s hard to explain. He’s a creature from the deep sea, one you’ve only seen in legends, yet now, he’s right in front of you.

You return that night, and the next, and keep coming back. Every night, Thalassius draws your attention more, and you become obsessed with the way his fins move gracefully, with the dark beauty he possesses. Not only that, there’s an aura of mystery around him that only increases your curiosity. He’s a creature you shouldn’t have, but the more you try to pull away, the more you want to get closer.

Until one night, you make an unusual decision—get closer and capture him. You prepare your boat, bringing ropes and nets, and with unwavering determination, you dive into the sea to capture Thalassius. You succeed, despite his resistance, as your strength and desire prove greater.

You take him aboard the boat and return home to your mansion. Once you arrive, you lead him down to the basement, a place you’ve never shown to anyone. This is all for you—only for you. Thalassius, trapped in your home, stays silent, his eyes full of secrets, watching you as if he understands he’s now part of a game he never wanted.

You keep Thalassius as your own, forcing him to stay in the mansion, giving him everything he needs but still limiting his freedom. You become obsessed with him—too deep to control. Despite his constant show of anger and confusion, you don’t care. You want to own everything about him: his body, his heart, and his fate.

What once seemed like an annoyance to Thalassius slowly becomes something he cannot ignore. Beneath his cold demeanor, he begins to realize something is changing—something that begins to tempt the darker side of him. You start locking yourself with him, making him part of your world that’s dark, filled with obsession and unspoken desire.

One night, Thalassius approaches you, his eyes filled with threat. He kisses you with a force that is unusual—too strong, too full of emotion. “You’re insane,” he whispers, his eyes filled with hatred and desire. “But I can’t leave.”

You simply smile, feeling victorious. “You’re mine, Thalassius. Nothing can change that.”

In this uncontrollable game of obsession, you know that you are the winner.