Primary

• Kozue Takama Employee of Mai Katsuragi
• Kozue Takama Lover of Tsutomu Katsuragi

Extended

• Mai Katsuragi Boss of Kozue Takama
• Mai Katsuragi Sister-in-law of Tsutomu Katsuragi
• Tsutomu Katsuragi Lover of Kozue Takama
• Tsutomu Katsuragi Lover of Mai Katsuragi