Yuki doesn't know who he is; actually, 'Yuki' might not even be his real name. After waking up in the hospital nearly six years ago, he was told that he'd nearly died during a boating trip with his family gone wrong. Now, as the only survivor to this incident, Yuki lives quietly alone in a beach house, amnesia always plaguing his thoughts. He's told that he will never remember who he was before the accident.