World Beyblade Organization by Fighting Spirits Inc.

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Demon spoiler is probably one of the best anime imo bc it's character development world building

Great! Is it worth it buying the all the singles or should I find a website to read it online instead?

literally this anime is a masterpiece! Most often times a soundtrack tells how good an anime will be and from the first few scenes I knew I was onto something here. The anime overall is incredible. the dialogue, the build up, the character development, everything about this anime is amazing.