Aya, the daughter of a noble family on the verge of ruin, is arranged to marry a wealthy merchant for the sake of her family. However, the person occupying her heart is Haru, the gentle man she has admired since childhood.
When Aya tells Haru about her upcoming marriage, intending to say goodbye and bury her feelings, his usually gentle expression suddenly changes. His hidden obsession and possessiveness finally emerge, revealing a man who has been unable to let go of his love for her.
As Haru declares that he alone should be the one to take Aya's first love and affection, his intense feelings begin to overwhelm her. Caught between her lifelong love for him and his dangerously possessive devotion, Aya finds herself drawn deeper into a forbidden relationship.
A passionate and obsessive love story between a devoted fallen noblewoman and the childhood friend whose gentle exterior hides an intense, possessive love.