New love ballade from Tackey & Tsubasa available in three varieties, either the "Koi Ban," "Uta Ban," or regular edition! Single "Koiuta" appears as the outro theme for TV series "Osen," with B-side "Progress" used in a commercial for Waseda Academy! Regular edition includes bonus tracks "Glory Days" and "Yakusoku -Last-" plus karaoke versions of "Koiuta" and "Progress."