A girls group IS:SUE (pronounced Isshu), who debuted from the first girls edition of the survival audition program "PRODUCE 101 JAPAN THE GIRLS," produced on the largest scale in Japanese entertainment history, releases their long-awaited first full album in a four-member formation following the recent return of youngest member RIN from hiatus for recuperation. Since their debut, IS:SUE steadily hones their skills step by step and consistently presents their true selves and the idea of "being true to oneself" since the birth of their "unique" NEW HERO. Do not miss the diverse "quartet" expressed by RIN, NANO, YUUKI, and RINO, marking a new beginning for IS:SUE. This work newly records previously released songs in four-member versions. The Limited Edition Type A and Type B feature a digipak specification and include an original photobook for each version.