Not Your Typical Isekai: Why Does It Become Genderbended???

A normal reader with a normal/kinda depressing life, got hit by a truck(-kun) and got isekai'd into their favorite story/novel/comic/game. It's that typical, right???? But, I, your normal love-for-black-hair-ML girl, that actually died by drowning from my bath tub like your typical isekai story, got isekai'd in the GENDERBEND version of my favorite novel???? What the heck?

Now, I see my favorite, beautiful elegant FL becoming a strong male with coral hair and pastel blue streak (not that I'm complaining though, he's still beautiful)???? The mature FL's friend becomes buff and sexy male with red hair and red eyes and scars (still sexy tho)???? And the hot villainess becomes a hot villain with white hair and purple eyes (officially, still smirking hot omigosh, he can be my favorite character!)???? Lastly, I, becomes the ML(now female)'s aide that supposed to be the 2nd ML?

Some notes:
1. English isn't my native language, please excuse my poor grammar/wording
2. It's for fun, sorry if the cover only a sketch (will fix it later)
3. It's for fun, I don't intend to offend any people, please tell me if there are any offensive language/anything that you found offensive