SKET+Sketch is a group which consists of Hiroyuki Yoshino, Ryokō Shiraishi, and Tomokazu Sugita, the seiyū for Bossun, Himeko, and Switch respectively with The Sketchbook (but not only Hiroshi Tada, the guitarist Riko Kohara and drummer Yuu Watanabe also sing). They sing the anime's 6th ending theme "Sekai wa Okujō de Miwataseta".

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