Summer was the worst for Choi Ji Won. His already sensitive thighs can't stand mosquitoes, or the water from the swimming pool where his son Ha Jun wants to play in, as they cause him to have an erection. And the presence of his step-brother, Lee Sang Yoon, who visits often, confuses Ji Won even more. "I'm trying to help you because you seem uncomfortable, hyung. Because, we're family."