Gunjō no Magmell (Japanese: 群青のマグメル, Hepburn: Gunjō no Magumeru, transl. "Ultramarine Magmell"), originally in Chinese as '拾又之国', is a Chinese comic series written and illustrated by Chinese artist Dainenbyō (Chinese: 第年秒/Dìniánmiǎo). An Japanese anime television series adaptation by Pierrot+ aired from April 7 to June 30, 2019. Dainenbyō launched the manga on Shueisha's shōnen manga app Shonen Jump+ in June 2015. Eight volumes have been published to date. An anime television series adaptation, also known as Magmel of the Sea Blue, was announced on April 29, 2018. The series is directed by Hayato Date and written by Chūji Mikasano, with animation by Pierrot+. The series' music is composed by Yasuharu Takanashi. It aired from April 7 to June 30, 2019 on Tokyo MX and BS Fuji. Fudanjuku is performing the series' opening theme song "Dash&Daaash!!", while a flood of circle is performing the series' ending theme song "The Key".