Creatures on a Half Shell (Creatureverse #1)

Mari has been handling things herself for a long time. When a mysterious man helps her out of a scary situation with some federal agents on the street near her home, she suddenly finds herself in the middle of weirdness. Who is this guy and his friends? Why are they green? Why do they all smell so good?

The Creatureverse takes place in an alternate world Baltimore where government experiments managed to escape the lab and hide in the hidden underground water ways, become secret vigilantees for what's right, all while also hoping to stumble across their Omega, of course.

It is an MMMFM Omegaverse.