Diabolik Lovers

A girl finds herself in a house full of bloodthirsty vampires. Unable to escape and with traditional anti-vampire weapons being useless, she becomes lost within the labyrinth of hallways. Source: crunchyroll

Yui awakens in a lovely bed wearing a lovely nightgown, with no memory of how she came to be there dressed that way. As she ponders this, she finds herself suddenly surrounded by the five younger brothers who start to argue over dibs on her. The eldest arrives and curtly informs her she must get ready for night school. She is instructed to behave herself or to face punishment, but she is confused as to what being behaved entails as she is compelled to submit to Ayato's every whim instead of attending class. Source: crunchyroll

Life with the six brothers becomes even stranger as Yui loses her appetite and becomes 'marked' as Ayato's possession. She is temporarily released from her duties as his personal plaything and sippy cup so she may get bathed. She enters the enormous bathroom to draw a bath for herself only to find Shu listlessly soaking in it, fully clothed. Then she learns to her sorrow that she doesn't have a single ally in the entire household. Source: crunchyroll

Yui accidentally displeases teddy bear-holding Kanato by incorrectly guessing what he wants from her, and he punishes her for her lack of comprehension skills by displacing her school bag, which in turn causes her to displease Raito by being in the wrong place at the wrong time. Raito proceeds to punish her using decidedly less childish methods, and mocks her for believing in something that can't physically save her from the evil that is him. Source: crunchyroll

Kanato finds Yui in the rose garden as she tries to sort out the new information about who betrayed her and gave her up as a sacrifice. He beckons her to follow him so he may show off a graveyard containing the grave of his mother. Assuming he would like some time alone, Yui attempts to leave which only infuriates Kanato with misplaced anger. Reeling from this experience, Yui wanders through the estate, and becomes worried when she hears groans coming from Reiji's room. Much to her folly, she enters the room to see if he needs help Source: crunchyroll

Yui refuses to accept that she should suddenly stop showing compassion towards her fellow man merely because they are vampires, and allows herself to be led to one of Kanato's most favorite places in his little world. As she views his family's collection of wax figures all in bridal wear, she finds herself eerily aware that things are not as benign as they appear. Kanato confirms her suspicions and gleefully sets to adding her to their collection, until he is interrupted by a summons. Source: crunchyroll

A mysterious woman gives Yui a chance to look into the past, when Ayato and his brothers were young boys. Source: crunchyroll

Yui asks the triplets about the woman in the purple dress who she spotted in the garden, and learns the grusome truth about what befell their mother. Yui runs out of the house in horror and collapses sobbing in the garden, only to be approached by Subaru, who demands she keep her distance from him, or else. Yui spends a sleepless night in her chamber, made less restful by the arrival of an unwanted guest. Source: crunchyroll

Yui experiences more chest pains and leaves the mansion in the middle of the night to seek answers from Shu. At first, he is unhelpful but quickly becomes interested in obliging her request for answers by forcibly tasting her blood to verify that it has indeed changed somehow. As she finally gets an answer to the question most prominent on her mind, whether or not her father knowingly sacrificed his daughter to these monsters, that answer becomes irrelevant in so many ways as the awakening is nigh. Source: crunchyroll

Cordelia and Richter savor one another's company for the first time in ages, until Ayato interrupts, demanding to know what they have done to Yui. Source: crunchyroll

Cordelia flaunts her reanimation amongst the members of the Sakamaki household, who immediately want her and her lover, Richter, out of their home, once and for all. Source: crunchyroll

The struggle between Yui and Cordelia for control over the body comes to a head. The boys hatch a plan to get rid of Cordelia for good. Source: crunchyroll