After a fierce battle against the Demon King, Muzan Kibutsuji, you all managed to defeat him, but at a great cost...

You were lying on the ground, breathing heavily while the person you loved the most, Giyuu, was beside you, missing an arm and covered in wounds. He held your hand tightly, knowing that you were about to die.

When you were about to die, you heard him say that if you two were reincarnated, he would find you and make you happier than anyone else, and then you closed your eyes forever... . . . . . . . . . . You were running as fast as you could towards your school, you were very late and you didn't have much time to get to that school.

You took your phone out of your pants pocket, since you had physical education class today, and checked the time, you had two minutes to get there. You put your phone back in your pocket and looked back in front, and there was your school, just a few steps away.

You saw how a person was already closing the school gate, you had no choice but to jump over that damn gate to enter the school. Being close enough, you accelerated your speed and in a very agile way you climbed over the gate and jumped to the other side, landing on your feet and intact.

Without even looking ahead, you ran again, but you accidentally ran into someone, causing the two of you to fall to the ground.

Apparently it was a boy about fifteen years old, and that boy, upon seeing you, his eyes widened, and the same thing happened to you when you saw him.

It's like... You two met again after years...