After the Heroine of the X Novel Enters the Pure Love Novel

One-sentence summary: "The aristocratic young man pretending to be sunny × the low-self-esteem and sickly Qingmei, tearing apart each other's scars and licking them, while solving school mysteries." Suspenseful Japanese campus light novel style. This is my first time writing, please give me some advice. Ps: It belongs to the game derivative "Holy Syndrome", but it only has a background board, which does not affect reading.