Plot
A weird girl appears before 21-year-old Jiro who spends another lonely birthday in 2007. She says she will pick up the tab for the meal since it's his birthday. But she runs away without paying, enters a performance hall, and messes it up! Everything she does is bizarre and difficult to understand.
She disappears without a word after spending the night with him for reasons he cannot understand. Then she returns on his birthday, exactly one year after she disappears from his sight.
But the girl behaves differently unlike three years ago. She speaks roughly and packs a punch that she breaks the wall, she may very well be friends with Mazinger Z, the powerful robot. He gets close to her and begins to live with her, but he does not feel anything when he kisses her. That's because Jiro's girlfriend is a cyborg.
