There's another world, quite similar to ours, where the young people attend schools at various levels, teachers worry about their students and gossip about them in the staff room, kids bully and tease each other in school and send text messages on their cell phones ... and everyone is born with animal ears and a tail. A child will lose these features after his or her first sexual encounter with another person. And that oddity is not even a main point of the plot of Loveless ... although it does become significant several times.
Aoyagi Ritsuka is a 12-year-old, still with his ears and tail (cat features, in his case, although we see some kids who appear to have puppy ears and tails, and a couple of them seem to be foxes) as well as more problems than any child deserves. His beloved older brother was murdered, and his mother is insane: she thinks Ritsuka is not her real child and it become clear, quite early in the series, that she abuses him physically because of it. Ritsuka's father occasionally tries to stop her, but he rarely seems to be around at all. Ritsuka's new teacher worries about him, but she's meek and ineffectual. Ritsuka is seeing a psychiatrist, but she doesn't seem to feel that she can interfere with his mother. To Ritsuka, the message is clear: grown-ups can't or won't do anything when bad things happen to children.
It's not too surprising that when a mysterious young man shows up, claiming to be a friend of of Ritsuka's dead brother Seimei, Ritsuka is completely fascinated with him. Especially because Agatsuma Soubi says he loves Ritsuka, And keeps saying it. Ritsuka is extremely suspicious of what Soubi means by this (as, I am sure, most readers would be), but sex doesn't seem to be the goal, despite Soubi's skeevy behavior. And then things start getting really weird.
Soubi and Seimei were apparently involved in a deadly serious game of magical spell battles. And Ritsuka has apparently inherited Soubi from Seimei. Given the nature of the adults in Ritsuka's life, it was not much of surprise to discover that all the combatants in the game are essentially children of some age or other (Soubi, at 20, seems to be one of the oldest). Over the course of the existing volumes of the manga, Ritsuka will attempt to discover what exactly happened to Seimei, while facing increasingly powerful teams of combatants with Soubi as his "fighter unit."
This is one of those manga series that leads mainly with the heart. There's a plot in there somewhere, and the artwork is loose and sketchy (and sometimes bad enough on the anatomy that I find myself thinking "I could do this better myself"), but the overall effect is compelling - if it hits you in the right places.
( Read more ... with spoilers and random psychological babbling )