Kyoko Tensuya , a demon chain that is known as a myth and has a contract with Yui Komori who she lives in her shadow . What happens when Kyoko finally reveals herself as a new student and girl in town ? Will she try to protect Yui ?

sorrow is a 16 year old girl who barely smiles barely eats and barley sleeps after her the death of her mother and little brother sora her father abused and rapped her till she was fed up and killed him she then set the house on fire she has never found anything to make her smile or laugh sorrow is not afraid of death and truly wants to die to be with her family . when her friend karlheinz sends her to go live with his sons the sakamaki brothers to try and make her happy will they end up liking her or making her feel worse find out on the book