Queen's Quality

 (クイーンズ・クオリティ; Kuīnzu Kuoriti) is a dark fantasy, supernatural shōjo romance manga written and illustrated by Kyousuke Motomi. It began serialisation July 13, 2015, debuting in the same magazine, Betsucomi, as QQ Sweeper.

Plot
Sixteen-year-old Fumi Nishioka is a homeless high school girl suffering from amnesia, often spending her nights in a secret unused room of the school. Despite having no memories, she chooses a positive outlook on life and is determined to find her "Prince Charming" in the future. One day however, she is found by Kyutaro Horikita, an unfriendly second-year student with a talent for cleaning, and is drawn into a mysterious door in the room through her classmate and delinquent Sakaguchi's voice calling for help. The door leads to the Void, a gateway linking thousands of people's minds, one of which is Sakaguchi's. Sakaguchi, who has been plagued by negative emotions and created a bug infestation in his mind, is cleansed by Kyutaro, who arrives just in time to save Fumi.

The school's chairman Koichi Horikita recognises Fumi's talent and decides to invite her as part of their family, explaining the situation to her. The Horikita family are "Sweepers", people who enter the mind vaults of others to cleanse their souls of bug infestations that are the result of uncontrollable negative emotions. As Fumi undergoes training to become a Sweeper and Kyutaro's partner, she stumbles upon an extraordinary power lying dormant inside her: the "Queen", a rare existence that can allow the bearer to have mind control over others. However, the Queen's power can be both evil and good, and some people are out to find her and capture her for their own deeds. Struggling with her training and romantic feelings for Kyutaro, Fumi attempts to search for an answer in her own soul and lost memories.