Discographie
2e album collaboration (02.12.2009): Petit Best (Kamei Eri, Mitsui Aika, Kumai Yurina, Okai Chisato)
1e album collaboration (15.07.2009): Chanpuru ① ~Happy Marriage Song Cover Shuu~ (Kamei Eri, Mitsui Aika, Kumai Yurina, Okai Chisato)
2e album collaboration (02.12.2009): Petit Best (Kamei Eri, Mitsui Aika, Kumai Yurina, Okai Chisato)
1e album collaboration (15.07.2009): Chanpuru ① ~Happy Marriage Song Cover Shuu~ (Kamei Eri, Mitsui Aika, Kumai Yurina, Okai Chisato)