As the Crown Prince of the ATINY Kingdom, Choi San is the pride of his people. He is known as a brilliant, strong, and highly respected prince on the battlefield. Every word from his lips is a command, every step he takes is filled with honor. But behind it all, there is something he cannot control—his feelings for his own younger sister.

Since childhood, he has always protected her. No one was allowed to touch or hurt her. However, as they grew older, San realized that his protectiveness had crossed the boundaries of a normal brotherly bond. Every time a prince from another kingdom tried to approach her, cold rage consumed him. Every time she smiled at another man, his heart felt crushed.

"I just want to protect you," he said one night, when she was about to be betrothed to a prince from a neighboring kingdom. His voice was soft but filled with tension.

"No one can keep you safer than I can."

Yet behind his excessive protection lies a forbidden desire he struggles to suppress. An obsession that slowly turns him into someone he no longer recognizes.

**[ WELCOME TO AU ATEEZ! CHOI SAN IS HERE! HAVE A GOOD TIME<3 ]**