I Reincarnated as a Monster in a Game World, and Picked up the Heroine Who Was My Oshi in My Previous Life

A brief description of the manga I Reincarnated as a Monster in a Game World, and Picked up the Heroine Who Was My Oshi in My Previous Life:
When I woke up, I had reincarnated into the world of a game I played in my past life. And what’s more, as a monster that’s hostile to humanity! It couldn’t be helped, so I just lived quietly so humans wouldn’t find me, but… The heroine, Noa, who was my oshi in my past life, was collapsed near my home!!
After I protected and nursed her, my oshi gave me the name “Rei”, so I decided to protect my oshi for life and follow Noa. I meet other characters from the game too, and I’m watching over Noa’s growth, but… the real Noa seems to be the type who’s a bit clingy and has a… “heavy” love?