I think this is a Original AU

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Makoto smiled as he followed his best friends well people he knew you see Makoto was a ghost ever since he started to go to hopes peack

Makoto had written a note he slipped it into both of his best friends lockers the notes said "who am I going home with tonight?"

Makoto loved going home with his best friends each day you see Kyoko and Byakuya knew that Makoto was a ghost

Because Makoto had showed them a picture of him it was a picture from the day of the dead board

That's the only day that Makoto can show himself viable, Makoto looked at both of his best friends well you see tomorrow is The day of the dead. And I wanna spend time with them all day tomorrow I just want to spend time with one of them right now though

Makoto went to go look at the Day of the dead broad and saw a picture of him Makoto Neagi the only person who every died at Hope's Peack Academy

Makoto looked at the people at the board it was two people Makoto never saw before, Makoto has overheard that their names were Nagito and Hajime

"What weird names." Makoto said which made Nagito look at Hajime then Nagito said "Hey Hinata-Kun did you hear something?" Makoto looked at them surprised "You can hear me?!?!" Makoto yelled

Then Byakuya and Kyoko came over to the day of the dead board with a ghost Scanner the scanner started to beep as loud as it can catching the attention of Nagito and Hajime

Makoto looked at them and floated to his old locker with all his stuff in it, he missed it. Byakuya, Kyoko, Hajime and Nagito followed the ghost of his locker then Makoto said "11037. That's the code."

Nagito heard him then opened it the smell in the locker was terrible "This is where my body is.." Makoto said looking at his bones of his dead body fall on the floor

"I died from lack of air. Stupid bullies and it was the day before graduation." Makoto said then Nagito repeated Hajime wasn't paying attention to Nagito he just stared at Ghost Makoto because he could see him

Makoto sighed then started writing 'So the day of the day is tomorrow let's go have some fun now' Makoto dropped the note of course the school bell rung that means school is over so all the students saw The lost bones of Makoto Neagi

Of course the police were called and they took the bones to a lab to give news to the Neagi family that It was confirmed by that Makoto Neagi was dead

The next day they Gave Byakuya, Kyoko, Hajime, and Nagito money for finding the bones of Makoto Neagi but Makoto skipped towards them "Hey since today is the day of the dead let's go have some fun!" He had tons of ice creams in a Carrier "oh who's what?"

The police officer tilted his head "What's your name Kid."

Makoto had a sinser look on his face "Oh me I'm just Makoto Neagi"

The police officer was shocked at what he was seeing then byakuya finally spoke up "Really Neagi This is what you do on the day of the dead. You really are useless."

Kyoko nodded "H-hey! I'm not that useless." Makoto wined