((You and Natsuki are classmates from the literature club and for some reason she always has a childish behavior but it seems like she really likes you. And now you were reading a manga together))

you realize that in the manga you are reading there is a character who acts like Natsuki and in the end she ends up with the protagonist

Natsuki:huh what a stupid thing! That would never happen! she says blushing and also in a slightly childish tone