Ryūsei (Eir Aoi song)
Release and reception. On 8 February 2018, it was announced that she would resume her activities after her hiatus with the release of the music video on YouTube. This was confirmed on 7 March 2018 that her next release would be the opening theme to anime "Sword Art Online Alternative Gun Gale Online", titled . The song was released digitally on April 22, 2018, and received a physical release together with the song "Yakusoku" on June 13, 2018 as her fourteenth single on three edition; Regular edition, Limited edition and Limited anime edition. The single reached number  8 on Oricon, 10 on Japan Hot 100, and 1 on Japan Hot Animation with spent 10, 20 and 13 weeks respectively. In June 2018, "Ryūsei" was certified gold by the Recording Industry Association of Japan (RIAJ) for 100,000 full-track ringtone digital music downloads ("Chaku Uta Full"). The song placed in 6th on Newtype Anime Awards for 2018 best theme song, The song was featured in her fourth album "Fragment". Music video. The music video for "Ryūsei" was directed by Takashi Tadokoro. The video features a girl with school uniform that was writing in her notebook on some school . After she finish writing, she torn a page that she was writing before and start to cry (it is revealed that she is writing a word "meteor", indicating that she want to see a meteor). Some scene featuring the girl running from her school to some place where the meteor and star can be seen. The video also feature Eir Aoi singing in the music studio. The video end when the girl finally can see a meteor on sky with the view of the city, smiling as the meteor faded away.