For Makoto, to create an imaginary boyfriend was the only way to overcome her grief that devastated her six years ago when the accident happened. She has a real boyfriend now and seems to be leading a normal life. But the empty feeling that started since the horrible accident continues to haunt her, preventing her from trusting and connecting deeply with other people. When a dying old man tells her that it is not easy to live alone, her mind shivers in the face of the unarguable truth. But afraid to be hurt again, Makoto's instinct tells her not to get too attached to her boyfriend and she leaves him.