E-girls are a unit composed of three sub-groups: Dream, Happiness and Flower, and three original members.

", became their first single to gain a certification by the Recording Industry Association of Japan (RIAJ)—receiving a double platinum award.

After this, E-girls release "Gomennasai no Kissing You", their first single to achieve over 100,000 units in Japan, and was certified platinum for digital sales.

Between July–November 2014, the group released four singles; "E.G. Anthem: We Are Venus", "Odoru Ponpokorin", "Highschool Love", and "Mr. Snowman", the latter two which achieved a gold certification by the RIAJ.

Smile: E-girls Best, the group's debut greatest hits compilation, was certified platinum by the RIAJ, but became their first record to miss the top spot on the Oricon Albums Chart.