Rings

Prior to debut

 * On February 30th, 2302 Union Project announced the try outs for a new unit.
 * On March 16th, 2303 Union Project introduced Rings the first group under UP to have females, and the first group to be mixed gender. They announced their first mini single would go on sale October 5th and the group would debut in January of 2304.
 * On October 5th, 2303 their first mini single released.

Trivia

 * They are the first group from Union project to be mixed genders.
 * They are also the first group to have co leaders.