|Romanized Title||Minna de Odoru Made mo Nai, Koko wa Ore Hitori ga Odoreba Jūbun da|
|English Title||No need for all of you to dance. I can handle it all by myself|
|Airdate||June 15, 2014|
|Opening||Cupidu Review by Aoi Yuuki|
|Ending||Kanojo ga Flag wo Tateru Riyuu by YELL|
|Previous Episode||Episode 10|
|Next Episode||Episode 12|
The mysterious girl is shown to be Serika Ginyuuin, also known as Sericchan, the idol loved by Japan. She is supposed to held a concert during the final day of the festival. Souta and Nanami learn that Sericchan managed to become an idol because Souta secretly saved her, by saying she has a "Success Flag", though she doesn't know the identity of that person, and she named him as "Purple Flagman". Souta realized that Sericchan is the Bard.
Before the concert, Serika sees Nanami and the others being happy to see them. She takes note of Souta and sees his smile resembles the purple flagman's. During the concert, Souta's power increases once more, and the time freezes up. No. 0 appears and tells Souta that he should not be in the world, or the world will be destroyed. So, despite Souta had promised the Quest Dorm members to dance with them, he breaks the promises and uses his power to make everyone forgets about him. Nanami, unaffected by Souta's power, is the only person who is able to remember Souta.