The Lostroom. A place where you can see what was lost, or maybe what will be lost to you in time. Existing in the innermost part of Chaldea, it is the boundary line between dream and reality where the light of the Moon shines through. Produced by the Chaldea Summoning System, the room holds a small number of worthwhile benefits to enjoy.

With graduation right around the corner, every member of the Light Music Club except for Azusa will be leaving for good. But the girls aren’t going to let something as silly as graduation tear them apart! For their final hurrah, the girls are going on the ultimate vacation tour— all the way to London! Their overseas journey will lead them on a trip of discovery and friendship as they take the stage one last time for their final encore together.

The year 2015 CE. The last era in which magecraft still thrived. The Chaldea Security Organization was founded to focus on preserving the continuation of human history. They observe a world which magecraft couldn't observe and science couldn't measure all to prevent the certain extinction of humanity. But one day, the future that Chaldea continued to observe disappears and humanity's extinction in 2017 becomes clear. Rather, it had already happened. The cause seems to be related to Fuyuki, a provincial town in Japan, in the year 2004 CE. There, an "unobservable region" that had not existed before appears. Based on the assumption that Fuyuki is the reason for humanity's extinction, Chaldea issues an order to explore, investigate, and possibly destroy this singularity – a quest for the Holy Grail, the Grand Order.

Rai wakes up from 820-years long sleep and starts his new life as a student in a high school founded by his loyal servant, Frankenstein. But his peaceful days with other human students are soon interrupted by mysterious attackers known as the "Unions".

When the Ministry of Education goes back on its promise to keep Ooarai Girls Academy open, the task of saving the five-mile-long Academy Ship from the wreckers falls to Miho and her barely-seasoned tankery team. However, things go off track almost immediately. While the Oorai tank crew may have won the high school tournament, they’re now facing a larger and more experienced university team, and if they fail, their armored vehicles will be forfeit! Will they be swapping their tanks for the memories? It’s possible, but winning a tank battle is all about tactics and teamwork, and the fledgling Ooarai students have more friends and allies than anyone suspects.

After falling for BC Freedom High’s clever deception, the Oarai Girl’s High tank-maidens find themselves faced with an entirely different battlefront than expected. However, Yukari suspects that any bluff that could have been carried out so easily by so many people must have some basis in fact. So, as the other school teams prepare for combat across the competition, Oarai digs down with a plan to undermine the groundwork beneath their opposition.

Too much tankery and not enough studying for her entrance exams has landed Momo in the hot seat! Luckily her friends won’t let her flunk out without a fight, and they’ve hatched a foxy plan to put her back on top. Miho’s stepping down to let Momo take up the mantle of commander, because if she can lead the team to victory in the Continuous Cup, Momo can retake her exams. The stakes have never been higher for the team as they fight for tank supremacy both on and off the combat field!

K-ON! Live Concert: Come With Me!! is a live concert held in Saitama Super Arena on February 20, 2009. A concert dedicated to all the K-ON! fans from each of the seiyuu of the characters. There are a total 9 seiyuu attending the event, including Aki Toyosaki (Yui's seiyuu), Yoko Hikasa (Mio's seiyuu), Satomi Sato (Ritsu's seiyuu), Minako Kotobuki (Tsumugi's seiyuu), Ayana Taketatsu (Azusa's seiyuu), Asami Sanada (Ms. Sawako's seiyuu), Madoka Yonezawa (Ui's seiyuu), Chika Fujito (Nodoka's seiyuu) and Yoriko Nagata (Jun's seiyuu). This concert has been attended by more that 17 thousand fans and a CD, DVD and Blu-Ray copy has been sold throughout Japan.

"K-ON! Live Concert: Let's Go!" is a live concert held in Yokohama on December 30, 2009. A concert dedicated to all the K-ON! fans from each of the seiyuu of the characters. There are a total 8 seiyuu attending the event, including Aki Toyosaki (Yui's seiyuu), Yōko Hikasa (Mio's seiyuu), Satomi Satō (Ritsu's seiyuu), Minako Kotobuki (Tsumugi's seiyuu), Ayana Taketatsu (Azusa's seiyuu), Asami Sanada (Ms. Sawako's seiyuu), Madoka Yonezawa (Ui's seiyuu) and Chika Fujitō (Nodoka's seiyuu). This concert has been attended by more that 17 thousand fans and a CD, DVD and Blu-Ray copy has been sold throughout Japan.