 LiSA 's musical style is described by Dennis <unk> of J ! <unk> as a young woman with style , beautiful vocals , and the ability to take on various musical styles , may it be happy , upbeat rock music or " even something more darker . " She has used the phrase " <unk> <unk> ii hi da " ( <unk> , " Another Great Day " ) as a theme throughout her career ; the phrase is also the name of her personal blog . In an interview with HMV Japan , she mentioned that before her major debut , she tended to sing pop songs , and because of this , she felt uneasy when making " Oath Sign " , which had a heavy and dark style , although she was able to receive several favorable responses to the single , which allowed her to make her next single " Crossing Field " with confidence . As for " Crossing Field " , she says that feels that the song grows every time she sings it , in the same way that love is <unk> through dates or love letters . In " Best Day , Best Way " , she mentioned that the song 's theme is " what you did yesterday will lead to what happens today " , and that the lyrics are delivered as if they are her own words . She also shared her experience with the single 's B @-@ sides : " I 'm a Rock Star " , which according to her represents her fulfilling her dream of becoming a singer , and " <unk> <unk> " ( <unk> , " White <unk> " ) , which represents happy feelings . 
