The development of the hentai sex doll began with the exploration of the boundaries of human fantasy. Designers drew inspiration from documentaries about alien creatures and created alien sex dolls with fluorescent tentacles and gradient scales. This product that combines biomechanics and subculture aesthetics breaks through the morphological limitations of traditional adult products. Through the combination of memory metal skeleton and electrochromic material, the limbs of the alien sex doll can change seven forms in real time, and the unique mimicry function of hentai sex dolls can change the skin transparency according to the ambient light, realizing the immersive restoration of science fiction scenes.