Masquerade is the story surrounding the Hiraga bloodline in which Gen is a part of. Recently orphaned, he moves in to his grandmother's house and unwittingly triggers the Hiraga clan's curse in which nearly every member leads a tragically short life. In his grandmother's house, Gen begins to unravel vaguely remembered memories from a dream he's always had. With the help of an American graduate student, they try to uncover the secret of the Hiraga bloodline, the whispered legend of immortality that is locked in his genes, and a way to keep Gen from sharing the same fate that every one of his ancestors before him has suffered.
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(Source: Anime News Network)

A direct sequel, continuing about nine months after the first season ends. 

Shougo has just arrived  town after he was ordered to do so since his grandfather has just died, her parents are busy with work so they told him to go first. Shougo will be the one to inherit all family assets.  Shougo arrives at the residence that will be his new home and he receives a great welcome by the beautiful maid Youko-san. A strange event happens at night, he dreams with someone but cannot really tell who it is, all he knows is that her face looks familiar... Next day he goes to his new school, her fianc&eacute; Ayano introduces to him telling him that it was something their parents decided on their own and that she has not accepted him yet, Shougo is in shock since he didn't know about this and many people are now jealous and angry at him since Ayano is the school's idol. Not everything is bad as he has a very warm welcome by a voluptuous beautiful teacher. <br><br>
Later a ghost appears before him, is the girl he saw in his dream last night, what does this means? All Shougo knows is that he has seen that girl before but where? 

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