Jin looked at the people who were gathered and eating while some were drinking. He sighed and walked towards the empty hall room where Y/n's picture along with her ashes were kept.
He sat on the ground, keeping the letter and the paper bag that Jungkook gave him in the floor and folded his knees, bringing them up close to his chest as he hugged them, placing his cheek on them as he stared at Y/n's face.
"I will forever love you."
He looked at her smiling face blankly. Sighing deeply, he took the white envelope from the floor and opened the seal. He took the letter out from it.
"What have you been hiding from me, butterfly?"
He took the piece of paper out of it and frowned to see only a few words written on the paper.
"Be happy, Jin. Go back to where you belong, please."
He scoffed and shook his head. "What does she mean by that?" Moving his hand around to bring the paper bag and slowly keeping the paper on the floor beside him.
Folding his legs, his black trousers stretched slightly as he unbuttoned the single button of his black suit to sit properly. He opened the paper bag and looked at the condiment inside it.
Donut. Chocolate syrup. Rainbow sprinkles.
The same dessert that helped him meet Y/n on this planet. He couldn't help but tear up again, choking slightly and covering his eyes to not let anymore tears fall off his eyes.
She planned it all.
How is he supposed to move on when he keeps crying whenever he encounters with something related to her?
He took the donuts and bit onto it, letting some of the rainbow sprinkles falling on the paper bag but he finished the two donuts and turned to smile at her picture.
"I ate, happy?" He asked in the thin air and felt his vision getting blurry again. "What else do you want? I just want to die, butterfly. I don't know what to do anymore-"
"Seokjin."
Jin looked up only to find the physics professor entering the hall and looking at him with sad eyes. He stood up and joined his hands on front of him, lowering his head as he walked forward and paid his condolences to Y/n before approaching Jin.
He held his shoulders but Jin heard a noise of something rustling. "I know things are so difficult for you, son. Y/n was really a bright student and even kinder girl. She was always so obedient. But I don't know what to do with this but I thought that I must give this to you."
He handed a folded piece of paper to him whilst he took it from him and unfolded it with curiosity.
(
This picture doesn't exist. Don't try searching on Google. I made this myself.)
His lips parted and his eyes widened as he looked at the paper.
The navigation map of his space ship.
"She said that she tried to send signals to the past time but it kept moving to somewhere in a different planet." Professor said and Jin looked up at him with big wavering eyes. Then the professor fished out another paper from his coat and showed him that.
"She then read plenty of books and discussed with me how the thin strip of stars resembled our very own magnetic field." He explained and showed the white dotted line on the navigation map.
"This is the line in which she sent signals but apparently it went to somewhere else. As if it changed its track and moved to the next line or the line next to it." Jin silently listened to him, thinking how Y/n completely hid the fact about him being an astronaut to the professor by lying that it was a navigation map of signals and not a space ship.
"She studied books for months and discussed with all of our faculty professors. Even met up with some of my PhD professor until she came to a conclusion." Jin anticipated over his further explanation.
"Timeline and Space."
Jin frowned and he looked up at the professor who nodded with a smile. "The signals were following a path of space instead of staying in its own track, not staying in its own timeline. Being pulled away to the next path because of a special force."
Jin realised and turned to him. "What force?" He asked but the professor just shrugged. "There isn't a particular name. But she discovered an even bigger thing." He said and pointed out the white dotted line again.
"The direction of the signal was forward. So if somehow we can reverse the direction and at a tremendous speed, without going off track, we can actually-"
"Go to the past." Jin finished him, gulping the lump and looking at Y/n's picture frame. He sighed, looking at the drawing.
"Exactly!" The professor clapped in delight. "She was a genius. If we maintain our space path and stay on track, we can change timelines and travel to the future or the past. Isn't this incredible?" He asked only to look at Jin who was staring at her picture blankly.
He sighed but then took out another envelope. "She wanted me to pass this to you on the last day that I met her, a month ago. I didn't think I'll have to give this to you when she'll not be here but you didn't come after that."
Jin was numb by now, tired of the puzzle that Y/n left behind for him to solve but he snatched the envelope from the professor who understood his mental state as he opened it only to find a paper.
"What is it?" The professor asked and Jin scoffed at the writing. He turned to look at her picture frame as a bitter smile rested on his lips, tears rolling down his face as he gripped the paper tightly.
"First, I must use the mentioned space speed that I used to come here, to return back to my own planetary track and then move backwards with the mentioned timeline speed so that I can go back to my past and restart from where I stopped. To do things all over again, right, butterfly?" He asked, tilting his head and staring at her picture.
"Go back to where you belong." He mumbled recalling the note that he received from Jungkook. He smiled bitterly and looked at the picture of Y/n, nodding his head with a strange determination laced in his eyes.
"Sure, I'll go back to where I belong. I promise you, my butterfly."
*******************
And when I tell you I made the science theories myself but not by getting inspired by any movie or drama?