Same-themed manga about kid fighting female ninjas from japanese imageboard.
(COMIC1☆4) [FREAKS (Mike, Onomeshin)] Kichiku Astron (Dragon Quest III) [English] {doujin-moe.us}
[Saida Kazuaki] Paipain (Japanese) plus HQ Colour Pages
Shujou Seikou II ?
[Uru] Elf Princess Strikes Back (Japanese, Ongoing)