Read this while keeping in mind that MC is a robot (a very autistic robot). Story is mostly about the girls. He is just there to comment and to get dragged around by them (he has no will). Existence of the romance tag in the title is not related to him at all. And for good reason considering all the girls who comes in to the story had MASSIVE affection for their respective love interests (who rejected them). It would make no sense for any of them to fall in love with him and they don't (not that he would understand anyway).