predia is an 11-member female idol group managed by Platinum Productions, who also manage other groups like PASSPO☆. This group has a sexy image and all the members are 18+. The group was founded in November 2010 and released their first single in January 2011. They are currently on an indies label. predia has released 3 singles, 1 album and 1 mini-album so far, and their 4th single "Crazy Cat" will be released on the 17th. predia also does live shows frequently, which are called "parties".
For more on predia, check out this site.
Source: predia's official YT channel