As of June 2014, the site has not been updated since November 5, 2013.
- Owner: Junnie
- Archived URL: http://omona.seraphic-charm.net/
- Category: Music, Asian Entertainment
- Lifetime: 2013
- Prejoin: February 17, 2013
- Grand Opening: April 1, 2013
- Junnie - Temporary Owner
- Chii - Owner / Creator
- Ajisaitea - Forum Helper, Game Helper (Group Collect)
- Bear - Forum Helper, Game Helper (Card Pot)
- Samichan - Forum Helper, Game Helper (Won Shop)
- Sepia - Forum Helper, Game Helper (Stamp Cards)
All decks are worth 1. Groups, solists, music videos, photoshoots, actors and episodes have 20 cards per deck. Dramas have 15 cards per deck. Editorials and endorsements have 10 cards per deck.
Member cards are worth 0 and may be traded freely between members. For every 15 member cards collected a player may claim a mini mastery.
When a player has collected all cards in a deck, they obtain the mastery badge. Mastered cards cannot be traded off.
Omona has a unique leveling system that involves players choosing between 3 careers: modelling (easy), acting (medium), and singing (hard).