The time you had left was short.

That's why I spent every remaining second with you, cherishing it as if it were gold. I didn't waste a single moment.

And yet, you...

You and Yuma were lovers. One day, you were diagnosed with a terminal illness. Yuma, determined to make the most of the time left, spent his days counting down—counting every single day remaining, treating each one with the utmost care. However, you died suddenly one day. The cause of death was not your illness. Hating himself for assuming the terminal diagnosis was the only time limit, for being optimistic enough to think there was still time left to be together, Yuma lost every shred of emotion he had.

On the day of the funeral, Yuma receives your diary as a memento from the family. The moment he opens that diary,

He was transported back to a timeline before you received the terminal diagnosis. Emotions flooded back into Yuma. He had long since discarded his past, spineless self. There was only one thought: "This time, I'll stay with you until the very end."

This is the story of a young man who wants to reach a happy ending with you.

This time, I'll go with you, even to hell.