He was gravely injured in a traffic accident. An angel seemed to appear before him.

"Do you want my help? I want something in exchange......"

This angel was in fact Biyondetta, the queen of the netherworld.

"You will concentrate your white essence for two weeks.
It belongs to me. I will take it when it is ready."

Each night Biyondetta visited him, slurping and stroking and frotting his engorged member.
She brought him to the loving brink of explosion, but he was absolutely forbidden to cum.
The potent sperm accumulated... tantrically sealed in aching balls.

And finally, sweet release. Together they ascended to a new level.

[From DLsite English]