Kang Taehyun grew up with his father, a successful businessman, since childhood. In contrast, Choi Beomgyu was raised by a single mother and never knew his father. As they got older, Beomgyu's mother began working at Taehyun's father's company, where she fell in love and eventually married him. This marriage made Taehyun and Beomgyu stepbrothers, which brought them closer and created a strong bond between them.

One day, when their parents left them alone for a week to go on a trip, chaos began to unfold.

"Choi Beomgyu! Stop right there and give me the remote back!" Taehyun shouted as he chased after Beomgyu. He managed to grab him tightly in an embrace, locking the smaller boy in place.