An eccentric, crafty beauty and a cold, lonely, arrogant, graceful young man seem to be destined. However, as their unexpected meeting unfolds, watch as their sweet romance begins!

From Shoujo Manga Maniac:

Duan Cheng Feng's aunt is one of the emperor’s concubines. In order to keep her high ranking status, she gives the emperor a child, but to her dismay, it’s a girl! She tries to convince her family to exchange the female baby for their nephew. In order to avoid it, the young boy’s parents fake a serious illness to make her give up her plan. But she won’t let a minor detail like that get in her way...

An eccentric, crafty beauty and a cold, lonely, arrogant, graceful young man seem to be destined. However, as their unexpected meeting unfolds, watch as their sweet romance begins!

From Friendship Scans:

Ke Lin received a doll with the same name as her as a present from her dad, who found it on a business trip in Germany. When she took her new doll to go play at the park, she met and became best friend with a boy at the park.

However, he had to move away soon and so, he made a promise with her that he will come back and find her. She gave him one of the glass shoes tied with a ribbon from her doll with her name on it as something to remember her by. Every day, she comes to the park waiting for him…believing that he would come see her again.

Fast forward to a few years later, Ke Lin is now a high-hchool student. QiangShu is a one of the students from the same high school. Ke Lin is attracted to QiangShu and reminded her so much of that boy from her childhood. However, there is a big problem – QiangShu is a GIRL!?

Second part of the Agreement of the Glass Shoe trilogy.

Deep in the palace, lives a girl named Yu Pan. Forbidden by her mother to go even to the outside, Yu Pan entertains herself by learning as many things as possible to be fit to be one of the Prince's mistress. Because of her eagerness and talent, the emperor invites Yu Pan to study with the Prince. Can she love someone whom she's never even met...? -- Manga Updates

With the related titles there's a total of 7 volumes, separated into 3 parts:

I. Agreement of the Glass Shoes (this title),

II. Dolls Music Staff, and

III. White Night Fantasia.

The 3 parts are linked by a pair of marbles with glass shoes embedded in them.

She's a girl who's turning 17 - great, right? Well, THINK AGAIN! Out of the blue, her parents leave her to go on a vacation trip around the world, but... they did leave her one million dollars to spend! Discover this charming girl's journey into adulthood through this hilarious manhua.