It takes place in a fantasy world populated by playable ghost-like creatures. The mascots are Nu and Lulu. There are eight playable varieties of these creatures: Jinny (cyan, includes Nu), Speedo (yellow, includes Lulu), Kiku (blue), Ula (red), Zaa (purple), Mikan (orange), Alibaba (green), and Mohalk (pink). The MMO featured battles against monsters and minigames where players could compete each other.
The website for the game seemed to have stopped updating in January 2007 and is now defunct. (Archived link
) Interestingly, since the 2010s there has been a Facebook page called "Nululu World" that shows a new art style and several more main characters. However, the Facebook page only teased the mobile games Nululu Dice and Nululu Dash from Brain Evolution Co., while there appears to be no revival or successor to the MMO game. There were earlier mobile spinoff games from SecondSoft such as Nululu: The Cave of Secrets, Nululu: Picture Hunt, and Numanza. There is also a short animated clip on YouTube.
Nululu Online contains examples of:
- Animesque:
This Concept Art for the MMO game contains strong hints of an anime style. The art released in the early 2010s also looks Animesque. - Blush Stickers: Everyone, or almost everyone, has these in Nululu Online.
- Our Gryphons Are Different: A gryphon ridden by Nu and Lulu is featured in promotional art for Nululu Online.
- Secondary Sexual Characteristics: The female playable characters have a ball-shaped body and a ponytail or tail, while the males are mostly round with a pointed tip on their backs. The female Kiku also have two pigtails instead of one.
- Virtual Pet: The player could feed or play with their Nu or Lulu and decorate its home with furnishings that boost its stats.
- World Tree: A huge tree named Daronpyra towers over the homeworld in Nululu Online.
