Doron Dororon concluded its serialization in Weekly Shōnen Jump in August 2022 after 36 chapters. Official Availability
While the file you referenced is a raw scan often distributed through unofficial channels, the complete series is officially available in English. You can find digital editions of Doron Dororon, Vol. 4 through authorized retailers like VIZ Media , Amazon , and Barnes & Noble . Doron Dororon - Tomo 04 (#26-#31) [Sin Raw].cbr
This is a Comic Book Archive file, commonly used for digital comics and manga. It is essentially a renamed RAR archive containing image files (like JPEG or PNG) of the manga pages. Doron Dororon concluded its serialization in Weekly Shōnen
The file refers to a digital volume of the manga series Doron Dororon by Gen Oosuka, specifically containing chapters 26 through 31 in an untranslated format. Volume 4 Overview 4 through authorized retailers like VIZ Media ,