Used

<<Hyouka>> February 14 / Ryo (Rishi Fukube x Hotaro ORIKI) / hbr

Used

<<Hyouka>> Tromelai / Firefly (Rishi Fukube × Maya Ihara, Shotaro Oriki × Eru Chitanda) / Kurabu Daso

Used

<<Hyouka>> Let's Fall in Love / Amemiya (Hotaro ORIKI x Eru Chitanda) / strobo

Used

<<Hyouka>> Little Sen Sorita / Ko (Hotaro ORIKI x Eru Chitanda) / 435

Used

<<Hyouka>> Hitohira / Akako (All Character) / adashino

Used

<<Hyouka>> What I want to say to you / 明日羽 / Sakai (Muneyoshi RIKUZAN x Hejiro Tana) / 明日羽 / Sakai

Used

<<Hyouka>> Before Everything Becomes Classic / Ichiko Ichikawa / Manabu Aoi (Hotaro ORIKI, Eru Chitanda, Rishi Fukube) / lyricalize