TYOSiN, who started his career as a guitarist and vocalist, has released a new two-song single "13's". The title track, "13's," is a grunge rock based song with a rusty melody and TYOSiN's rude lyricism. Neck" is based on grunge punk, and is a sharp song with TYOSiN's signature sharp rap and shouts. Song by CHAPIOX, the song was written by TYOSiN. The logo of "SiN" used on the jacket was created by designer BEYOND (LOIN ARMIS), as on the previous album "The night".