She left his side at the age of ten and went abroad to learn the worldly ways and management concepts that she shouldn't have learned at her age. She came back when he was in his senior year of high school... He was willing to repeat his second year of high school for him... He found that she was still as well-behaved and smart around him, but as cold as ice in front of outsiders.
Concept: Childhood sweethearts, childhood sweethearts, fighting against wealthy families