Dream of Mirror Online (DOMO) is a free-to-play MMORPG game with story lines based on ancient Chinese mythology. The graphics are anime-style with various Chinese themes. This game places great emphasis on teamwork and building relationships between players.

The gameplay encourages players to build relationships and form teams. Players can form special friendships, student-teacher, or even love relationships within the game that grant extra benefits such as abilities, fame, titles, or items; the Asian versions even currently offer in-game character marriages that grant special abilities to the lucky couple. Some characters also have special fated ties to other players that are based on the birthday selected for the character at creation. These relationships are marked by an arched red line, or "love line" that will form between the two. The love line represents not only potential romantic matches, but also possible family relationships and rivalries.