I like how this song has a Earth Wind & Fire reference. Vardia is a reference to the "ba de ya" part in Earth Wind & Fire's song "September," and also during the part where Megu and Kaede talk in the bridge, where they say," Nee Vardia, oboiteru? Ano ku gatsu no hi no dekigoto," it means "Hey Vardia, do you remember? The happening on that one day in September?" It references the lyrics to September -"Do you remember the 21st night of September?" And then it repeats "ba de ya". Also during that part, it sounds like a sped up version that. Not only that, but the lyrics have a similar theme.
飛行機と電車と自動車でそれぞれ新潟から東京へ移動する3人の目的地は日比谷野外大音楽堂。歌詞の「いまからあなたに逢いに行きます」は「会場で待つファンのあなた達にいま逢いに行くよ、待っていてね」というメッセージが込められています。リリースの数日後に「Road of Negiiiiiii」と題されたワンマンライブが日比谷野外大音楽堂で行われました( kzbin.info/www/bejne/fKeTp2CsfpKfhsU )。