It's made by the original artist/author so it kind of is the original manga.... yeah.. I hate myself too. Artsy_nela
It is NOT made by the author... But by the group Nanana Nana... Someone need to change that ! Moreover you can SEE the art style is completely different. Also it's not a side story to the manga but a doujinshi
Iruma is a spooky baby too, my bd is on October 4 too and I’m 15 lmaoo.(づ ̄ ³ ̄)づ