I do find some things interesting
1. Primary ML being able to modify his body, finally resulting in becoming human
2. How each mutant gets their powers
3. MC pretending to comply easily so that he won't be bodified to carry children. Reminded me of that woman who said that she carries condoms in case she's raped so she at least wouldn't end up pregnant.
4. The body modification, fear of pregnancy, his first period, his intolerance towards his new body, and such
5. The reasoning given by the mutant on why MC is suffering.

It's like someone else possessed the author's body to write Love Shuttle. The rest of it all is just a Rape fest.
I believe in separating fiction from reality and I'm thoroughly against censorship. But seeing as the author is making money off of this, I do wish they would work on their story telling skills more. If Rape is the only catalyst and consequence of any action, if it's the only thing that stands out, your writing skills are bad. It's like a horror movie relying on jump scares.