Asuka, a woman in her thirties, works in a lakeside fish factory. She’s about to be married to her boss, Taki. But one day, she encounters a kappa – a water sprite found in Japanese folklore – and learns that the creature is in fact the reborn form of Aoki, an old crush who’d drowned to death when they were 17.
Asuka fucks her fiance at her place (13:06). She stops him and starts making love to him again when he tries to go to the bathroom because that is where she's hiding the kappa (a Japanese mythical water sprite) who is in fact the reborn form of Aoki, an old crush who’d drowned to death when they were 17.
Asuka fucks her fiance again, and they go at it harder than in their first one (49:29).
Asuka impaled herself on Aoiki's kappa penis (which is quite different from a human penis) and starts humping him in a reverse cowgirl position (1:14:20), when he dies after offering his life to the god of death so that the latter will spare Asuka's life. This revives Aoiki, well at least for a while, and they have proper missionary sex before he finally disappears for good.