Primary

• Hiro Hirono Friend of Miyako Miyamura
• Hiro Hirono Friend of Kei Shindou
• Hiro Hirono Friend of Kyosuke Tsutsumi
• Hiro Hirono Brother of Nagi Hirono

Extended

• 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
• Kyosuke Tsutsumi Friend of Hiro Hirono
• Kyosuke Tsutsumi Lover of Kei Shindou
• Kyosuke Tsutsumi Former lover of Emi Izumi
• Miyako Miyamura Friend of Hiro Hirono
• Miyako Miyamura Rival of Kei Shindou
• Nagi Hirono Sister of Hiro Hirono
• Nagi Hirono Friend of Yuu Himura
• Nagi Hirono Sister of Hiro Hirono