I got reincarnated into my favorite RomCom/Fantasy Manga IRFRFM

I love romantic/fantasy comedy manga.
The main character had a harem, but there was a also girl that didn't belong to that harem.
She still liked him a bit, but her fate was sealed. She was known as the unluckiest girl.
Yet, I liked her. She was my favorite character.

One day, I got hit by a truck. I passed the main character's best friend. I thought this as a dream, and I made time for me and her.

And in the moment, I confessed my feelings to her.
"I love you! I will make you happy! I will protect you forever!
So, please go out with me!"
I made sure to properly confess.
But... later I realized... I can't wake up from this dream? I am not sure what to do.
And with that, my new life in the new world that I know the most and with my favorite character that I love the most.
And so, my story, romantic comedy started.
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PS: The cover's not mine. And the hero is also based on this pic, but a little different and cuter.