A month has passed since (Y/n) started living with the Sakamaki brothers and her 'annoying' sister Yui. Things were peaceful for a while after the incident with Ritcher and Cordelia, however, when (Y/n) was living with the Sakamaki brothers she had learnt that she's the reincarnation of a woman named Aiko, who has demon blood. (Y/n) and the brothers have no idea where the demon blood originally came from but, on one night, when the brothers and the two sacrificial brides were on their way to school a car crash happened and that's when they met four mysterious figures, who are the Mukami brothers, and they were vampires just like the brothers but they were not purebloods. One night, (Y/n) and Yui gets kidnapped by these four handsome vampires and they started craving for their blood in order to achieve their 'apple of Adam' plan that was created by Karlheinz, the Sakamaki's brother and the demon King, however, while (Y/n) was living with the Mukami brothers, (Y/n) began to discover some changes as her story progresses. What will happen when (Y/n) gets along with the Mukami brothers? will she find out who she truly is? who are her old friends? find out in this second story of 'Yui's Sadistic Sister'!

Seventeen year old Saki is, somehow, the other sacrifice bride aside from Yui. Now, she must live with Yui who has been in the unknown household for a long time with secrets that are discovered and tell what Saki is. Can Saki stay in that house without dying? -Completed-