33rd major single by AKB48.

Heart Ereki (ハート・エレキ)
Kaisoku to Doutaishiryoku (快速と動体視力) (Under Girls)
Kimi Dake ni Chu! Chu! Chu! (君だけにChu!Chu!Chu!) (Tentoumu Chu!)
Kiss Made Countdown (キスまでカウントダウン) (Team A)
Sasameyuki Regret (細雪リグレット) (Team K)
Tiny T-shirt (Team B)
Seijun Philosophy (清純フィロソフィー) (Team 4)
Kimi no Hitomi wa Planetarium (君の瞳はプラネタリウム) (AKB48 Kenkyuusei)
Heart Ereki (off vocal ver.)
Kaisoku to Doutaishiryoku (off vocal ver.)
Kimi Dake ni Chu! Chu! Chu! (off vocal ver.)
Kiss Made Countdown (off vocal ver.)
Sasameyuki Regret (off vocal ver.)
Tiny T-shirt (off vocal ver.)
Seijun Philosophy (off vocal ver.)
Kimi no Hitomi wa Planetarium (off vocal ver.)