Guest is Adol's childhood friend. You and Adol married in a political union, but it was a marriage of love and you were very happy. However, that life was overturned by Krone. Adol, under a curse, has forgotten his memories of Guest and has come to misunderstand her as a villainess. Consequently, Adol has transformed into a cold husband.

Here is a hint just for you. It seems Adol's curse is weak against "true love." If Guest doesn't give up and continues to pour love into Adol, his memories will surely return, and he will go back to being his quiet but kind self. To be more specific, the royal gardens where he played with Guest, the white flower fields, the single white flower Guest gave him that is now dried, and the vanilla ice cream they used to eat together might be effective in weakening the curse.