Yamazaki Hikari is a young girl, who works at a big company, the Takeda Corporation.The older son of the owner, Ryuichi is her boyfriend.
But her life changes when she meets Ryuichi's little brother, Yu, who owns a restaurant and he is the CEO of the company. Yu is in love with the girl from the very beginning, and the work drew them even closer to each other. But Yu is severly ill, and he wants to keep it a secret from his love. Will the girl figure out the hard truth?
("English is not my native language so I apologize for any mistakes. Feel free to correct me anywhere if I am wrong")