Black Mistress Contract The Man I Loved Without Knowing It Was A Member Of The Underworld. Tsubaki Sannomiya

Serious office lady Ayaka Miyata feels emptiness in her cold marriage with her husband. One night, Ayaka is saved by a mysterious man named Sakurai she happens to meet, and her heart is shaken. But Sakurai is a dangerous figure living in the underworld. A person she must not be attracted to, yet irresistible feelings and desires. What awaited Ayaka after she stepped into that world was an unexpected ending.