One night, the main character (Motoki) and his girlfriend Yuuna were involved in a car accident.
But fortunately, he were able to save his girlfriend's life by pushing her out of the way and taking her place instead.
A few days have passed, Motoki find himself in a hospital.
He walked into the corridor to ask what has happened to Yuuna since he and Yuuna both involved in the accident.
He tried asking the nurses there, but no matter how much he talk to them, it seems like they don't even notice him.
He gave up and returned to his room.
Then he finally realized something is weird...
There is a person sleeping in the bed... And if you look really close, that face looks very familiar...
Yes, the person that was sleeping was none other than himself.
"There isn't anyone that can see his own sleeping face".
Motoki, while being in a "spirit state" left the hospital and began searching his girlfriend.
He went to the school and finally found his girlfriend.
But like other, it seems like even his girlfriend didn't even notice him.
Then came Shouko and Ryuusaku.
They were always together, no matter what they do, they were always a group.
But yet, he can't even hear his name coming from their conversation.
He desperately called to them to announce his existence but all of it was in vain.
In there, he finally realized the shocking truth...
His girlfriend suffered from a memory loss!
Not only that, but all of the memory lost was all related to him.
The time that they spent together, and even his existence...
It looks like that accident was the cause.
He went back to his room in the hospital and found his relatives talking to the doctor.
"His brain has suffered a big damage, right now he is in a coma state", is what the doctor said.
"If the condition worsen, in a few days he probably will..."
Motoki's life now had a time limit.
But Yuuna's memory still showed no sign of coming back.
Will her girlfriend be unable to remember her for the rest of her life?
And can he be able to return to his original body?