Wikipedia
is the 21st single from the Japanese idol group Idoling!!!. It reached number 3 on M-ON! Countdown 100, number 2 on Music Station Single Ranking, and number 6 on Oricon Weekly Chart. Idoling!!! was divided into two groups. The main body of the group stayed with the name Idoling!!!, while the other group was called Idoling NEO. Idoling NEO consists of Idoling!!!'s new members, who just joined in August 2013, with addition of #23 Yuna Ito and #25 Kaoru Goto. Both groups released a single at the same time, with Idoling!!! releasing Shout!!! as their 21st single under the Pony Canyon label and Idoling NEO released mero mero as their first single under the Avex label. Both had to compete on the Oricon weekly chart for which group sold more than the other. The losing side will then receive a severe punishment.
On November 25, 2013, it was announced that Idoling NEO lost in the competition. Idoling NEO has to receive the punishment, which is having to wear skinny tights.