page 4 : i think the explaination is : her decoy clones are counted as objects , not living girls , so she is running a shop that sells $ex toys , not a brothel with real girls . the clones cant get pregnant , and they dont carry any disease .
page 6 : maybe next time , angel boy should lock the door , or harpy girl should knock 1st . what if harpy girl opens the door when angel boy is changing his clothes / stroking his d!ck / fingering his pu$$y ?
page 15 : two succubus girls want to drink "牛の精" = Bull 's $emen / Essence , maybe in modern japan , there are wines and teas with this name .