Isekaied as a Millipede into an Fantasy World

Synopsis
Ryan Bell is your average perverted nerd who works as an entomologist with a thing for Bug monster girls in anime and manga. One day he dies at an save the rain forest protest on a first date. In the afterlife he is given an offer from a goddess because her sister has broken the rules she is allowed to reincarnate a soul into her world and unite her creations. The goddess is called Hesper and in her world she is the goddess of monsters and night her sister Alba is the goddess of Humanoids and day. Alba had summoned people from earth creating heroes that have nearly wiped out the monsters. Ryan accepts the offer and sent to this world. Will he unite the monsters and what acts will he commit to get it done. Follow him into this world where to sort out a op asshole they send in a more op asshole.

Warning: The mc has a monstrous form and will have sex in that form also he dose commit rape.
This is my first novel try to be constructive in criticism and please read the tags if its not you cup of tea seeing some be evil and do evil things. Note there will be a wide variety of fetishes in the sex scenes. Any scenes that involve sex will be put in a spoiler. All Characters are 18+ If i am missing a tag let me know. Also the Mc will get a human form later.