Interesting detail in latest Pandora chapter

[Excel_Lover]

So I was just mindlessly checking out Pandora in the Crimson Shell, since I hear it's ending now or something, and I find this little funny detail here on one of the pages. Seems like Rikudou might be once again making another crossover with Excel Saga. Always kind of wondered if he was, just based on some of the art he'd post on his Twitter, but now here's concrete proof of it.

…I think I may need to read this series now.