When a life ends, its soul departs to its final resting place known as the Soul Society. However, if a soul is left to wander in the human world for too long, it ends up turning into a corrupted "Hollow" that feeds on other souls. In such cases, spirits called "Soul Reapers" are needed to eliminate the Hollows and guide the lost souls to the Soul Society.

Ichigo Kurosaki and Rukia Kuchiki are two Soul Reapers who are used to dealing with Hollows that appear in Karakura Town. But when they encounter the hostile "Blanks"—souls devoid of memories and immune to the "soul burial" used by Reapers—they are thrown for a loop. Senna, a fellow Reaper that neither Ichigo or Rukia are familiar with, comes to their rescue and manages to fend off the Blanks. The mystery deepens when a mirage of the human world suddenly appears over Soul Society. What could be the reason behind the strange phenomena, and how is it connected to Senna, who avoids any questions about her identity?

[Written by MAL Rewrite]

Unaired anime episode bundled with the limited edition of High School DxD DX.2.

Princess Anisphia "Anis" Wynn Palletia has always dreamed of flying through the sky, even though the people of her kingdom consider it a silly ambition. Also at odds with her goal is the fact that Anis is incapable of using magic despite her noble status. Refusing to give up so easily, she renounces her right to the throne, and focuses on developing "magicology" by combining various resources with knowledge from her previous life on Earth. Due to Anis' nature, responsibility for the kingdom's future is passed onto her younger brother, Algard. Pushed into a political marriage with Euphyllia Magenta, a girl he hardly knows, Algard rebels by spending more time with a commoner girl than his fiancée. After Euphyllia tries to intervene, Algard publicly calls off their marriage and denounces his ex-fiancée as a bully. After crashing into the banquet where Algard makes the announcement, Anis rescues Euphyllia on the flying broom she is testing. She decides to make Euphyllia her assistant, which the other girl reluctantly agrees to. Although their partnership appears random at first, Anis has an ulterior motive for wanting Euphyllia's company.

After a momentous New Year's vacation and with Valentine's Day approaching, Sawako Kuronuma is beginning to get along with her classmates. However, now that Sawako has realized her romantic feelings for the popular Shouta Kazehaya, she grows hesitant toward giving him obligatory chocolates and decides to not give him any. In turn, Kazehaya, who likes Sawako, feels a distance between them. As February ends and April arrives, the second year of high school begins for Sawako. Luckily, she ends up in the same class as her friends Ayane Yano and Chizuru Yoshida, along with Kazehaya and his friend Ryuu Sanada, in addition to the newcomer named Kento Miura. When Kento develops an interest in Sawako, Sawako and Kazehaya's feelings for each other are put to the test.