My Friend in the Second Dimension Is the Heroine

What kind of story would happen if you traveled to the second dimension and met the heroine when she was a child? The protagonist of this article died suddenly while reading a novel and came to the two-dimensional world. My Youth Story Love is really problematic. I have very few friends. That's it for now. There will be more in the future. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.