At a certain night party, Laila, the daughter of a merchant, hears that her fiancé-to-be is going to marry his friend, and is shocked. Thinking that she would be a burden to her family, Laila is suddenly proposed to by a young man called the 'Spirit Mage'. He suffers from health issues due to having too much magic power, but it seems that Laila can heal him. Despite the various good conditions offered, Laila agrees to live in his mansion as the fiancée of the mage Julius. Although her fiancé is a bit absent-minded and mysterious, he treats Laila with care. They chat, make sweets, and go out together, and Laila starts to enjoy this life. However, as Julius's health improves and he becomes more attractive, he starts to get a lot of attention. To make matters worse, the woman who stole her ex-fiancé is now infatuated with Julius. Things are getting complicated...