There is monk who is obsessed with monsters and one Happens to follow him around and call him master. The monk (Uke) helps the monster (spider money? Also seme) with he’s hard. Seme started following since he’s scared of females (since spiders will eat their mate). Seme is fond of Uke. Uke steers away from humans due to trama in his village. They both help each other and care for one another. While visiting a friend Uke finds out he’s not human (we don’t find out what he is) but that doesn’t bother them. This brings them closer and Uke finally reciprocates semes feelings and they get ‘married’. They are happily together.
(2) Side couple
Seme who’s boss is other ukes friend. Hes finally gonna be able to see his lover (Uke) after 500 year (time moves different for them since they live in different worlds? (I think). Once they reunite they don’t know how to act. Uke was always leaving and not telling seme with the help of the boss seme helps Uke and they talking it out and connect their bodies. They are happily together after with seme being an octopus and Uke is a shark.
Bouzu to Kumo