"For cubic U I didn't know how it all got started at all"

In this quote, Utada Hikaru is expressing confusion and uncertainty about the origins of a situation including someone referred to as "cubic U." The use of the word "cubic" could suggest a complex or multi-faceted individual, while the letter "U" could represent an individual or entity. The expression "how everything got going" implies that there is a backstory or history to this circumstance that Utada is not knowledgeable about. The repeating of "at all" emphasizes the extent of her absence of knowledge and understanding. In general, this quote communicates a sense of confusion and a desire for clarity and understanding.