Does everyone know the words "circle of transmigration"?

In this generation people call it reincarnation. If they're living once now, everyone wants it to be the next time they're born, thinking 'Ahh, I want to be that' with an aspiration for the next life. And it happens a lot whether or not that's the case, if they're reborn as a human being that's still okay, it could be a dog or a cat, or even insects, or plants; because there are extremely varied choices, they want to walk forward into the next lifetime. No, being restricted to a single soul isn't to be limited. Perhaps, we can't say it isn't the case that the same soul splits and diverges like the branch of a tree...

On a certain time in a certain place, there was a man called L. And there was a woman who was engaged to L, but L was full of vigor to succeed in life. With his marriage to the woman close at hand, his boss conducted a formal marriage interview between L and a girl he recommended, who was the daughter of an influential person in the business. And L readily abandoned the other woman. Her grief from that incident alone was judged from her suicide, but her wish to have the final blow continued after that... Because the two of them were keeping company at the same workplace, it became difficult on her part to stay there and she couldn't help but resign with the appearance that she was being driven out. She had lost a place to go and a place to return, but in the end, she thought to throw herself from the rooftop of a tall building...

She left behind three things. Those were the shoes she had been wearing, the ring from the ring finger of her left hand, and a letter she had written to L. One would think that letter was composed with pent-up grudges and resentment, but surprisingly, the sentence was concise.
"When I am reborn, I won't leave your side even for a moment..." was all that was written.

Well, L on the other hand, with his wife-to-be being the daughter of an influential man, began to succeed in rapid strides. It was certainly like he was running full speed in an elite course. At first he had a guilty conscience, but those feelings faded away in proportion to the growth of his desires, and in one year, all memories of his deceased former lover were buried in the depths of his heart.

One day, L felt a pain in the back of his head and when he touched there, he noticed that there was a protrusion like a pimple.
"Strange... a pimple in a place like this? Whatever, it'll go away soon."

Since it was so painful when he first touched it, L didn't pay too much heed to it after that. But that pain only increased instead of healing, and when he touched it he felt that it was getting bigger. Whether it was that he was distracted when he went to do his job at the company, he didn't feel the pain then, but he was too busy with work to even go to the doctor about it. Every evening, L would numb his nerves with alcohol, awaiting a natural cure while forgetting about the pain.

How much time would pass before the pimple was done...? One more night, L returned home late and sat on the sofa in his own study to take part in what had become his daily routine of an evening drink, when he was attacked by pain more violent than anything he had felt up until that point. As if in a conditioned reflex he put a hand up to the back of his head, but the next moment he felt a different unease. He brought that hand before his eyes and saw what had to be blood on it, from the place he had touched...
"Ahh... did it finally burst? No, this is different..."

When he looked at his fingertips one after the other, that blood wasn't sticking to them, but it was flowing from his fingertips...
"What the hell? Why am I bleeding there?"

He looked again and there were wounds as if his fingertips had been sliced open with a box cutter.
He tried thinking in full operation though his head was hazy from the alcohol, but he couldn't recall where he had gotten injured. As he was mulling over it, L heard what was like a whisper of a memory from the back of his head...

"Didn't I tell you? 'When I am reborn, I won't leave your side even for a moment...' From now on we'll be together...! Yes, until you die..."

Nobody knew L's whereabouts thereafter.

Eh? Then how do I know this story, you say? I'm sorry... I cannot answer that... The one behind me is very noisy, you see...