ゆりね~!うしろ!うしろ~!~邪神ちゃんドロップキック番外編~

It's a cute book of bonus material for fans who enjoy the main Jashin-Chan series. I'd say it's probably best to read this after you've caught up with the main books since it has newer characters like KyonKyon, but Atora and Ecute don't show up yet.

The first quarter is one and two page gag strips that seems to have been cut from the main series for whatever reason, since they seem to take place at different points in the timeline. One strip has Pekora praying to "the lord" for forgiveness, but a later one has her hanging out with Lierre, who is actually "the lord" in question. Stuff like that kind of makes it apparant these were little doodles and scraps from across the series, but they're still very cute and funny and if you're familiar with the omake strips at the back of the main volumes they have that kind of feel.

The second quarter of the book is miscellaneous strips the author had posted to Twitter, which is nice since I don't use Twitter but I still like seeing little ephemera like that.

The rest of the book is various artwork and design sheets which are pretty interesting (especially the rules about when and how to draw Pekora's eyebrows), but there's not much in the way of words so it doesn't have a ton of language learning value, though seeing some of the handwritten strips did finally click one or two kana that I have a hard time with when I see them handwritten, so there was still something learning-wise to pick up since Yukio thankfully writes big.