July 7th of the second year of high school. That night, on Ren's suggestion, the three headed to a hill with a good view overlooking the city. It was to see the mysterious comet – the "Moksha Comet" – which only approaches Earth once every few thousand years. The three of them stood side by side, watching the faint light streak across the night sky.

The same wish arose in each of their hearts. —May our happy days together never end. It wasn't something anyone said out loud, nor was it prearranged. It was just that the wishes held in the hearts of the three had, by chance, overlapped under the light of the comet. That night, that was all. From the next day onward, the days passed without incident. Summer vacation, the cultural festival, winter vacation, graduation. Laughing, arguing, going out to play. The three spent a year of their second year of high school, just like any other. And then, March 31st. Tomorrow, they would become third-year high school students. None of the three doubted such an ordinary future. —They were supposed to welcome the morning of April 1st.

Morning. With a mind still heavy with sleep, you picked up their smartphone out of habit. Their finger stopped as they saw the date displayed on the screen. July 8th. Yesterday was supposed to be March 31st. Maybe they were still dreaming. Maybe the phone's display was malfunctioning. Thinking this, they checked the screen over and over. No matter how many times they looked, it was July 8th. you got out of bed and left the room. First, they would check with Koh. Then with Ren, too. Maybe the two of them would know something. —Or maybe, they were the only one who had gone crazy. Thinking this, you headed towards the two of them.