Cyrus, Hideo, Blake, and Kenta are four teens who are lost and alone in a dark alley to survive in their harsh and tough lives. Until Karlheinz stepped in and took them in. They were showered with love and care where they see him as their father figure. When Karl is out of town for unknown reason, he sends them to live with his six sons and a girl at the Sakamaki mansion. While living with the Sakamakis and Yui, they spend their everyday lives where they uncovered mysteries about their pasts and the Sakamakis on the other hand learn about theirs. Started in October 6, 2017 Compete in October 17, 2018

Right after the Mysterious Four battled Adonis and his sons, things haven't changed for the mysterious pals when they still living with the coldhearted Sakamaki brothers and the sweet and innocent Yui Komori. However they'll be more challenges for the mysterious Four. What will happened if Tristan came to the human world? What obstacles do the four friends faced? How will they survived at a mansion full of sadistic and twisted vampires?