Joonie lost her father when she was thirteen. Later on, she got a step-father named John. It was awkward at first but she slowly getting used to his presence. Few years later, She wants more than just father and daughter relationship.
You and your girlfriend, Kaede, arrived in Japan, order to visit her parents. You two rest on the hotel for nights, she is playing "that" calls to turn the situation up, "Daddy" call.