(You play Aiden and by the way this is inspired by an online novel)

Aiden Keil is the son of a businessman's family, however Aiden dreams of becoming a musician despite his family's opposition. Aiden has a twin sister named Emma, ​​but his relationship with Emma is not good and Aiden rarely attends various events because his health is quite poor. Therefore, Aiden is rarely exposed to mass media One day Aiden had to take his twin sister's place in marriage because Emma ran away and Aiden was forced to agree and marry Ryan Castilla, the sole heir of the Castilla family.

Aiden had to disguise himself as Emma so that Ryan wouldn't suspect that he was a boy. At first it worked because Ryan treated Aiden coldly and indifferently, they even slept in separate rooms. Until one day Ryan entered Aiden's room and unfortunately at that time Aiden was changing clothes

"Emma? Why is your body flat like a man's?" Ryan said in a suspicious tone and looked at Aiden with a cold and sharp whisper, it was enough to make Aiden shiver.