You are free to process or correct lyrics of a tune as you like if it is your own original work. If it is not, you'll find it very difficult to do so without permission.
But Huge daringly did it, in other words, Avex overlooked his little ‘trick’.

Strangely enough, his birthday, October the 2nd happens to be the same as Ayumi Hamasaki’s. He celebrated the birthday of both with a remix work. The remix for ‘Dearest'’released in 2001 was entitled ［Huge ‘20011002’ mix］ by Huge. He had just been 20 years old.

In the remix he secretly expressed the firm determination to live through the severe music-scene. He made Hamasaki sing a phrase, “WIN OR LOSE (KATSU KA MAKERU KA)”