Primary

• Kyosuke Tsutsumi Friend of Hiro Hirono
• Kyosuke Tsutsumi Lover of Kei Shindou
• Kyosuke Tsutsumi Former lover of Emi Izumi

Extended

• Hiro Hirono Friend of Miyako Miyamura
• Hiro Hirono Friend of Kei Shindou
• Hiro Hirono Friend of Kyosuke Tsutsumi
• Hiro Hirono Brother of Nagi Hirono
• Kei Shindou Friend of Hiro Hirono
• Kei Shindou Friend of Mizuki Hayama
• Kei Shindou Rival of Miyako Miyamura
• Kei Shindou Lover of Kyosuke Tsutsumi
• Kei Shindou Twin Sister of Chihiro Shindou
• Emi Izumi Former lover of Kyosuke Tsutsumi