f5ve was first played on NTS on 15 November 2024. Songs played include Underground • アンダーグラウンド, Lettuce • レタス and UFO.

f5ve (pronounced fivee; formerly known as SG5, short for Sailor Guardians 5), is a Japanese girl group co-managed by LDH JAPAN and global management firm Three Six Zero, and represented globally by WME. It is a special project unit based in the United States and consisting of selected members from the girl groups Happiness and iScream.

The unit was announced in May 2022. Its executive producer and co-creative director is American musician BloodPop®.

The members are Kaede, Sayaka, Ruri, Miyuu, and Rui.