I got reincarnated into my favorite RomCom/Fantasy Manga

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. ==== PS: The cover's not mine. And the hero is also based on this pic, but a little different and cuter.