The merman my man is a story between a bloodthirsty spider-man and a kind and naive researcher. Linda, a researcher at a Japanese maritime university, discovered she was raped by a lewd spider-man in a dream. This inspired her to conduct research on this mythical creature. With her professor Gary, they set out to sea in search of the merfolk. They have successfully captured a German, but Linda has been marked as its mate… Was it a human who captured a German, or was it a German who found its prey?