Midori is the EVEN MORE bizarre romantic equivalent to Parasyte's grotesque parasitic broship. They present the same problems - namely, how it's too awkward to masturbate with a talking hand - but go about them in very different ways. One involves a lot of death; the other involves a lot of love.
The 'hand' in Midori is more like a female talking hand-puppet that JUST HAPPENS to be joined to the lead's arm one morning when he wakes up... and is the girl the lead has a crush on, ofc. On the other hand, Parasyte has a transforming alien life-form that, initially, had every intention of eating the brain of its host. So, slight differences. But these are the only two series in known existence that deal with a symbiotic person-hand relationship and all of the WEIRD bonding that occurs as a consequence.
Watch Midori for laughs and Parasyte for disturbing action... and Migi. How can you/guys not like a right-hand with a mouth and Aya Hirano's voice?