Midori's boyfriend broke up with her on her 20th birthday. Not wanting to end the day in a gloomy mood, she enjoys drinking for the first time in her life, but what she sees is a group of lovers happily cuddling up together. "I want to love someone, and I want to be loved. I want to be irreplaceable for someone." The next morning, Midori wakes up in her room to find a beautiful young man lying next to her. The heart of love is busy with being pushed around, and being pushed around.