Bishoujo Tulpa no Mariru-chan

Tulpas are illusions, conceived within one's mind. Ruri Masato is an occult-loving shut-in NEET. His view on women is twisted due to his gynophobia, but one day, he creates a tulpa called Mariru. Wait... you can have sex with a tulpa?! Let's see what it'll be like with this innocent and pretty girl tulpa! [Translated from official website]