SAP is a CITY SOUL unit that works in conjunction with the YouTube music collaboration channel "Sing Along! Project" with 115,000 subscribers. 7/15 (Sat.) SAP debut digital single song featuring 14-year-old authentic singers Rei Kato and Emi Kumamoto. Penthouse's Shintaro Namioka was invited to write and compose the song, creating a truly next-generation CITY SOUL. In "You're Mine Tonight feat. Kato Rei & Kumamoto Emi" released this time, in addition to real JC's powerful twin vocals, BOSS's soulful chorus work is also a highlight.