In the world of Loveless, each person is born with cat ears and a tail, which disappear only if that person engages in a sexual intercourse. Because of this, they have come to symbolize virginity and innocence. Additionally, fighting is only done by "fighting pairs" or couples, where one is known as the Sacrifice and the other as the Fighter. The first receives the damage while the latter attacks. Ritsuka Aoyagi is a 12-year-old boy, who for some unknown reason suffers from amnesia. His brother got killed recently, and as if his life has not been hard enough lately, on his first day at the new school he gets approached by a stranger called Agatsuma Soubi, who claims to have known his late brother. Ritsuka finds out that Agatsuma and his brother used to be a fighting pair, and that Agatsuma has inherited Ritsuga now that his brother is gone. Together, they try to find the truth behind his brother's death and the organization known as the "Seven Moons," which may have been responsible for it. All the while, it seems that Ritsuka and Agatsuma are becoming closer than they intended to be…

Takato Saijou has held the title of "Sexiest Man of the Year" for five years running. He is an accomplished actor, with 20 years of experience under his belt, and is aware his good looks are well above average. Proud of his career, Takato regards the title as an appropriate indicator of his success. But when his reign is ended by acting newbie Junta Azumaya, who debuted only three years ago, Takato's initial shock gives way to jealous hostility. Even in the new drama that he has been cast in, Junta seems to have suddenly surpassed him; snatching Takato's usual spot of lead actor, Junta continually manages to get on his nerves. Most infuriating of all are the bright smile and kind words that accompany everything Junta does. All this animosity comes to a head, however, when Junta catches Takato in a rather vulnerable drunken state. Endangering his own public image, Takato confronts the junior actor with harsh words and angry comments—an opportunity Junta takes every advantage of. With the famous actor Takato Saijou now on video picking a fight with a co-star, Junta has the perfect means to blackmail him. Asking the price of his enemy's silence, Takato is shocked to find that his motivation lies far from advancing his career; instead, Junta's terms are those that can only be realized in the bedroom! [Written by MAL Rewrite]

Hikaru Kusakabe is a normal, carefree boy in a rock band who is always focused on the present. During the summer, his entire class is forced to participate in an upcoming chorus festival. By coincidence, he discovers his classmate Rihito Sajou—known for being an honor student with excellent grades—practicing his singing alone. Sajou just cannot seem to get their class' song right, and Kusakabe, delighted at seeing a new side of his straight-laced classmate, offers to help him prepare for the event. Although their lives and personalities are total opposites, they begin to grow closer as time progresses. But with the pressure of an unknown future, what will become of them and their growing relationship? [Written by MAL Rewrite]

On the planet Amoi, a person's status is primarily dictated by the color of their hair. This society is run by the AI supercomputer known as Jupiter and its governing board of perfect blondes, referred to as Blondies, living in the capital city of Tanagura. However, the darker-haired humans live out their lives in the golden "pleasure city" of Midas and its outlying slum Ceres. They are known as "mongrels," and most cannot progress out of the slums. Three years ago, a boy named Riki disappeared from the slums of Ceres. Once the revered leader of the gang Bison, a sudden encounter with an elite Blondie, Iason Mink, forced Riki to abandon everything he had cultivated. The boy was snatched from his home and forced to become Iason's pet. Riki has spent the past three years enduring numerous blows to his pride, his time in Tanagura nothing but a form of torture. Now that Riki has returned, Bison once again rallies behind him. The risk he finds himself in, however, is much greater than ever before—there is always someone ready to sell him out. [Written by MAL Rewrite]