This premise have elements of potential. The loneliness yet surrounded by all the books bibliomaniac ever wants with cute little creatures could fit beautifully to paradoxically sad yet cheerful setting - like the feel one gets from "Humanity has Declined". The amnesia and having a fellow human who acts like a robot hints of a possibly interesting backstory if done right.
But I see too many tropes - particularly how explicit in monologing the loneliness of the MC with the all too cute girl in the end. I cannot expect this will be of the deeper stories. Nor one of the engaging ones. But still earned a follow for now from me.