It's malignant. This auther even imitates the spine decoration of Shueisha's Weekly Shonen Jump. The design of this spine is so famous that every Japanese boy has seen it at least once.
This design is owned by Shueisha and is shared by all the manga artists participating in the Jump, so I don't want outsiders to copy it. Hey zol, how selfish? You have nothing to do with Jump, much less Shueisha, do you?