Crazy and Obsessive? No, She’s a Serene and Gentle Big Sister

[Single Female Lead][Transmigration into a Book][Lighthearted Romance][Professor Sister][Cold on the Outside, Warm on the Inside][Mom-like Girlfriend][Song Copying]

I woke up from a nap.

Jiang Yichen discovered that the world he was in was the same one he had read in his previous life, a yuri (lesbian) angst novel.

One of the original female protagonists in the novel was his older sister.

The other female lead is named Qin Ling.

A ruthless person who would slap even a dog that walks by.

"Sister, listen to me, you must stay away from that Qin Ling..."

Inside the milk tea shop, Jiang Yichen offered advice to his older sister.

Little did he know, Qin Ling, whom he was talking about, was sitting right behind him...

......

P.S.: No yandere elements, just a regular romance novel. The female lead is a cool, gentle, and mature woman.