Tiffany is a professor while Taeyeon is the student and it turned out that Tiffany is engaged to Minho. As the day passed by, Taeyeon grew her feelings for Tiffany but the latter, rejected her because Tiffany thought that she was in love with her fiancé.
Tiffany always knew that she just love Minho as her best friend but she was blinded by ideal life which she had planned to have a family so she accepted Minho’s proposal. She tried to ignore her feelings for Taeyeon.