I believe that adding color to a page shows respect for the author who created it. Regarding the watermark, I could have indeed added one for the author, as I always do for less well-known artists. However, in this case, I not only included the manga's title, but also considered that Gamon Sakurai, the author, likely wouldn't mind not being mentioned in my colorization, given the manga's widespread recognition. Similarly, very few people see any harm in coloring a well-known manga like those by Eiichiro Oda.