Eager to know why her best friend’s boyfriend dumped her for a man, the headstrong Eiya Arakawa suggests a meeting with them. Gathered together at a café, Yuuga Oota agrees to answer Eiya’s questions only if she can correctly ascertain the relationship of a couple sitting across from them, which she does on her first attempt. Amazed by her astounding intellect and intuition, he invites her to a private meeting where he introduces her to the concept of Slave Control Method, or SCM, a retainer-like device that has the ability to turn people into slaves. When two SCM users enter a duel, the devices exert a powerful influence on their brains. Once the duel is over, the SCM amplifies the loser’s sense of obligation and forces them to bend to the will of the winner. Wanting desperately to test his own abilities, Yuuga asks Eiya to act as his insurance in the event that he himself becomes a slave. Granted access to 10 million yen, Eiya’s job is to convince Yuuga’s would-be master to free him from his servitude. Though hesitant at first, Yuuga’s words resonate with her personal yearning for something more from her life, and she agrees to his request. However, when a mysterious organization begins rapidly accruing slaves, Eiya becomes entangled in a game far more dangerous than she ever could have imagined. [Written by MAL Rewrite]

Despite being a refugee from an extinct planet, having an alcoholic as a father and an airhead for a mother, Maris' biggest problem is that she's a Thanatosian. Considering that Thanatosians are six times stronger than the average Earthling it shouldn't be such a curse, especially in a galaxy where violence is rife. But the accidental destruction she wreaks on everything she touches —even with the exotic alloy restraints she wears— means she's constantly in debt. Every mission she's assigned to by the Inter-Galactic Space Patrol becomes a cash-drain when all the damages are docked from her wage. But when she's selected to rescue the rich and sexy Kogane Maru it's like a dream come true. After setting him free from the terror of his ruthless kidnapper his eternal gratitude will surely guarantee marriage —and an end to all her financial headaches.

Soul Eater NOT! is a spin-off and side story that takes place one year prior to the events of the original Soul Eater. At the Death Weapon Meister Academy, humans born with the power to transform into weapons and those with the power to wield these weapons (Meisters) train to hone their natural talent. The characters of the main series are enrolled in the Especially Advantaged Talent class, where they train to become warriors of justice capable of defeating what threats prey on innocent lives—or even the entire world. Other students at the DWMA are less talented. Members of the Normally Overcome Target class focus less on being warriors of justice and more on controlling their powers so they don't hurt themselves or anyone around them. Tsugumi Harudori, a new halberd-transforming student, meets Meisters Meme Tatane and Anya Hepburn and quickly grows indecisive about which of the two new friends should be her partner. As they learn to use these powers and settle in, their lives as everyday students will be far from normal.

Dreams begin to haunt Lady Sheru -- dreams of her past life as Pirotesse. Her love, Ashram, is being tormented at the hands of the soul of Barbas posing as their former king, Beld of Marmo. Interpreting this as a plea for help, Sheru searches for a way to save him by entering the chaos realm using the Chaos Ring. Meanwhile, Redon and his friends are called to arms again as ancient creatures begin to appear after being sealed away for centuries. Both their paths will cross once again, and on their shoulders will the fate of Crystania lie.