Piros the Third's Shirt IRL

[Erroneous]

In the light novel .hack//G.U. Ragtime from the .hack//G.U. Premium Edition in Japan we see the daily lives of several characters including Piros the Third, Wiseman, Silabus, Sakubo, Atoli, Kuhn, Endrance, and Alkaid. For each character in this light novel they have one illustration of them offline. And Piros the Third in particular has him wearing a shirt of a character from another CyberConnect2 property, CC2 Chu from Cap Cup City.

Under the silhouette of the mouse girl CC2 Chu, you can see the name Cap Cup City.

But moreover, CC2 Chu as shown below is the character from the silhouette.

Here are a few promotional videos.