In the novel, there was a line in the pillow's description that it transmitted sensations to the pillow's "model" (within a limited radius).
Novel Thor straight-up invented teledildonics. It looks like the manga version isn't nearly as bold.
lewd people who wants to hold hands while sleeping will naturally be able to make a device to do so just like how horny people who never once touched a breast can make a jiggle physics so realistic enough to be labeled as a bleeding edge algorithm lmao i kept forgetting that this manga turns normal shit into weapon of destruction of even auxiliary items on par with it lmao i'm gonna fuck that body pillow like there's no tomorrow