Stamps can be used to communicate with other players in Virtual Live shows and during Co-op Lives.
Players are initially given a set of automatically unlocked stamps that include all the VIRTUAL SINGER unit members, as well as one member of each other unit.
More stamps can be obtained via various methods, such as:
- Purchasing a stamp from the Stamp Shop using a stamp exchange ticket.
- Purchasing the [Crystal Shop Limited] Stamp Set with paid crystals
- Attending Virtual Lives
- Upgrading a character's Character Rank
- Upgrading a Kizuna Rank