"Attouteki na GO!!" (圧倒的な GO!!?), lit:Overwhelming GO!!, is a song in the first Mugen Souls that is played at a game trailer and during Fever Time.
The song is sung by YUIKAORI (Yui Ogura & Kaori Ishihara), who are also the Japanese voice actresses of Sharuru Cocott and Welsh Cocott. It is one of the vocal songs that are not included in the official soundtrack of the game but instead, it comes from the Flip Side/ bonus track of their single, "Kimi no YELL".
"Kimi no YELL" (君のYELL?) is a single that comes with the "Attouteki na GO!!" song as a B-side track and is released under the label, King Record Co., Ltd. in Japan on March 14th, 2012 Japan. Its sale date was announced on December 2011, which is one week earlier than the release date of the original Mugen Souls. The CD comes with both vocal, and off vocal versions of the songs. The single has made it to the Oricon Singles Chart twice: it made #10 on the daily charts on released and #27 on the weekly charts. It has also made #10 on the Billboard Japan website and performed this song live with dance a couple of times on their first 2 tours.
On October 23rd 2013, "Attouteki na GO!!" was included in another album called "Bunny" as track #3.
"Attouteki na GO!!" was described as a comical and strange song, YuiKaori have also sang it at their first two Live Tour events.
Ogura said that YUIKAORI (her and Ishihara) are not usually very fast paced, it is a comical song. When they first heard it, they wondered if that was even their song and was very surprised. They were using polite Japanese while they were singing Kimi no YELL and had to switch it up for "Attouteki na GO!!" which is a very fun song with lots of energy, the word "GO!!" is what brings lots of movement.
Ishihara said that they were a little worried that they should would not be able to sing the song fluently, the song had a very strong back chorus. YuiKaori felt insecure about singing a high tension song such as "Attouteki na GO!!" at first, but when they actually singing, they do pretty well.