I know I shouldn't be falling in love, but I just can't help it.

Chikako, who had dreamt of going on a luxurious world cruise since she was a child, finally makes her dream come true. During her trip she is rescued from an accident by Masato, the CEO of the cruise company. She ends up staying in his suite and getting taken care of. Masato is the perfect gentleman, teaching her how to dance and showing her kindness, and Chikako's heart can't help but be drawn to him. However, out of the blue, he says, "I'd like to make a business transaction with you."