It's a song I worked on like 4-5 days nonstop once I received Rin and Len V2.
It's in French but there are English subtitles available. The song's main theme is that Rin is getting worried about fading away now that everyone seems to just care about Miku x Teto songs. And Len is helping her by telling her to keep moving forward, that one day she'll regain her glory.
Due to the theme,the whole song is composed in a retro style, even the instrumental itself uses an SC-88 Pro and an SD-90. Midi hardware from the 90s and 2000s.
