よっこらせっくす (Yokkorasex)

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This song was uploaded on September 29, 2008, and has reached over 1,000,000 views.

The song itself is about wishing somebody "good luck" and cheering them on, but the PV conveys a completely different message. It shows KAITO and Gackpo dancing around with only clothes around their regions. Len watches them throughout the song, and at the end of the PV he joins in, dancing in his underwear. Rin and Miku are shown in the chorus and end.

This song is featured in the EXIT TUNES compilation Vocalolegend and Vocalotwinkle.