Tiffany Hwang, the only heir was diagnosed with Intellectual Disability (ID) so her father hired the specialist doctor Kim TaeYeon to treat her daughter.

Jeonghan struggled from bullies, homeless life, ty father and mother who abounded him since young age due to his illness, but the lad didn't give up, he kept struggling with his life hopping for a bright future, but will he see that future with his cruel father and high school bullies?!  

He was very ill, mentally and physically, and being violated by his own lover, that man showed no mercy to him and because of his weakness he locked him up and took his phone and everything away by the time, so what will the lad do from now on ?!

He live with his grandma who was the only one that took him under her wing when no one accepted him due to his illness.  

He lives with his mother in a village since ever his parents divorced because of him as they always say and he was treated really badly by everyone, even his grandparents because he had a mental disorder causing him to behave like a child although he's a grown young man around twenty-one. His only escape was a young gentleman living a few blocks from their house.