Included with the limited edition BD of Fate/kaleid liner Prisma☆Illya Movie: Sekka no Chikai.

The ghostly Hanako-kun and his mortal assistant, Nene Yashiro, usually have their hands full resolving various supernatural incidents in Kamome Academy, but how do they spend their time when they get a break from all that? Come and watch the characters of Toilet-bound Hanako-kun play games, get sick, change genders, and discover world-shaking secrets during their laid-back after-school hours!

Gorou, a first-year high school student at a private high school in Tokyo, has no "hopes," no "dreams," and no "ambitions." The world is "indifferent" to him, and he spends his boring, unchanging days with his best friend Akitsu while having a faint longing for Honoka, a classmate at the same school. One day, Gorou receives a strange notification on his smartphone. "You have been chosen. Please make a wish." Gorou thought it was malicious spam, so he tweeted, "I want to do something naughty with my idol Honoka." The next day, he is invited by Honoka to pull down his pants in a deserted arcade... "Congratulations on the fulfillment of your great desire!" Then, a mysterious girl, Lall, suddenly appears. Confused by the series of events, Gorou is told of a cruel fate. Gorou was chosen by the "Great Will" to fulfill his wish, and in order to do so, he and the other Kamisama (God) candidates would kill each other for the title of "God" until there was only one left. The first candidate to appear as a potential Kamisama was, of course, Honoka, whom Gorou had longed for. What choice did Gorou make against Honoka, who attacked him mercilessly?

Haruo Hibiki, a former orchestra conductor, suddenly appears in front of Tenshi whose peaceful daily life suddenly turns into chaos after meeting Haruo. Although Haruo is an up-and-comer, his troublesome personality causes him to be kicked out of the orchestra. In exchange for being allowed to return, Haruo must meet certain conditions. The conditioning being to establish a new boy's choir club with only male voices at Kawagoe Academy and win the National Boys' Choir Competition. Tenshi and his friends are forced to join the 'Boys Choir Club'. The new choir members are fed up with Haruo, who has a personality that is immature, cannot read the atmosphere, and can't help but use abusive language. However, as they continue to sing and are swayed by Haruo's mysterious guidance, they eventually become absorbed in the choir. As high-level rival teams appear one after another, will the Kawagoe Gakuen Boys Choir Club be able to accomplish its reckless goal of winning the competition? A hot-blooded youth comedy filled with soulful choir songs!