The spring and autumn in your eyes are better than the mountains and rivers I have seen and loved
The female protagonist is a cancer in the fandom. When she learns that the idol she has been chasing all over the world for four years is about to get married, she returns to the story of ten years ago when she became beautiful and slimmed down and chased the idol head-on.
Only a star-chasing dog can understand the despair in the first chapter. The stupid author actually doesn't want you to understand. Not understanding is the greatest happiness.