This unit is INFINITE F (Infinite F) from Korea's popular Boys Group INFINITE. INFINITE F 3 People Selected Unit by Sonyol, L, and SONJON. After almost 10 months of the nation of the unit in a concert in February 2014, they have gathered expectations of fans, and finally adorn the debut of Japan and Korea. The title track "Breasts Wide" is a youthful tune with a refreshing sense of flow. In addition, it includes 3 songs from Hitmaker Sweetune, "I'm You" that spent time in this single's most recording. Both of them have been produced simultaneously in Japanese and Korean versions. It is also fun to listen to Japanese versions. This single contains 2 random cards from a total of 9 types (3 different members) of photo cards.