Wild Star Lantern

(I took the translations up to Chapter 12 from the Nomad Translations website, and the others were done using machine translation.)
synopsis:

Gu Jia Nian failed the college entrance exam and went to her grandmother's house in the countryside for summer vacation.
She accidentally entered a villa covered in creeping plants and inhabited by a recluse known by the villagers as someone who never left their house and avoided the light.
Children even secretly called him a vampire behind his back.
As the vacation came to an end, she did two things: discussing with her parents about retaking the exam and confessing her feelings to him.
One succeeded, the other failed.
Two years later, Gu Jia Nian studied diligently in the competitive Chinese literature program at a prestigious university.
In a literature appreciation class, the professor assigned a reading list, with nearly half of it coming from a rising star novelist-who had won major literary awards with a full-length novel and a series of medium-length novels.
Gu Jia Nian sat in the library at 2 a.m., opening the preface of that full-length novel.

It began:
"Rough start, with over a dozen interruptions due to the erosion of romantic fantasies by harsh reality. Until one day, she knocked on my door, cleared the messy Chinese hawthorn outside, and handed me a box of pastries. From then on, light poured in."

Guide for newcomers:

The male lead falls for the female lead after she comes of age.
They get together after she retakes the exam.
Six-year age gap, Student-Teacher Relationship (SC).