Imaginary Girlfriend

His "imaginary girlfriend" doesn't have anything down there...!?

Kuuta, a boy who grew up in the countryside with a communication disorder, has an imaginary girlfriend. Though a delusion, Nari seems entirely real: a bit jealous, but beautiful, erotic, family-oriented... truly the best. In order to have sex with her, he needs to get to know real women and increase the image resolution of his imaginary girlfriend... She's devoted, but forming a harem...!? An exciting new youth love comedy!

(Source: Takeshobo, translated)