Li Xuan

The eldest daughter of the Yan family, Yan Jinyu, who has been missing for 16 years, has been found. She is brought back from an orphanage by her fiancé, the Second Master of the Yin family.
That year, Miss Yan was 18 years old.
…
The Yin family was one of the top families in the capital.
Second Master Yin's full name is Yin Jiujin. People call him Master Nine. He's 24 years old and has made a killing in the business world.
Master Nine follows his grandmother's wishes and finds the eldest daughter that the Yan family has long given up on searching for. He brings her home to raise her himself.
…
Yan in the eyes of outsiders: "Good figure, good looks, high intelligence"
Yan in the eyes of a friend: "The girl-next-door (That's weird). She's cold and ruthless."
Yan in the eyes of Master Nine: "She's young and inexperienced. She doesn't look like an 18-year-old at all. She looks wild and evokes a sense of pity towards her."
…
Those people who think that the eldest daughter of the Yan family is an unpresentable country girl are all slapped in the face.
Master Nine imagines that the person he brought back is a silly little girl. Gradually, he realizes that the little girl is sometimes quite cool and very strong.
Everyone believes that she has no backing and is just a lonely little pitiful girl. Unbeknownst to them, she has a few companions who have gone through life and death with her countless times. Together, they've built an amazing venture.

Henyee Translations

The Atypical Young Lady Has Returned

Henyee

After a long while, Yin Shuguo asked uncertainly, "Is she really going to make a call?"

"…" Yin Shuguo was speechless. Was this girl deliberately avoiding the topic of school?

"Is school that scary? I'm not asking her to get first place. I'm just asking her to go through the motions to get a diploma."

"According to Little Yu's past information, she stopped going to school after graduating from junior high school. However, before that, her results seemed to be not bad either. It's said that she's in the middle of the class. Why is she so against going to school? Could it be that she's afraid that she can't keep up?"

Yin Jiujin picked up the tea on the coffee table and took a sip. He glanced at Yin Shuguo and didn't say a word.

Moderate grades? All the information they could find about the girl's past was fake, let alone information like her grades.

Just This Once