Similar to ‘The Bridegroom Was a Dog’ mentioned above, this is also a long short story available in a mini-collection form. But this is just about the creepiest, weirdest story I’ve ever read. An older man pays to sleep next to a young woman at a weird brothel-esque house for narcoleptics.
First published in Japanese 1961. Included in The House of Sleeping Beauties and Other Stories, Vintage International 2017