Primary

• Eiri Uesugi Younger Brother of Mika Seguchi
• Eiri Uesugi Lover of Shuichi Shindou
• Eiri Uesugi Brother-in-law of Tohma Seguchi
• Eiri Uesugi Older Brother of Tatsuha Uesugi

Extended

• Shuichi Shindou Best friend of Hiroshi Nakano
• Shuichi Shindou Lover of Eiri Uesugi
• Shuichi Shindou Older Brother of Maiko Shindo
• Tohma Seguchi Brother-in-law of Tatsuha Uesugi
• Tohma Seguchi Brother-in-law of Eiri Uesugi
• Tohma Seguchi Husband of Mika Seguchi
• Tohma Seguchi Cousin of Suguru Fujisaki
• Mika Seguchi Older sister of Tatsuha Uesugi
• Mika Seguchi Older sister of Eiri Uesugi
• Mika Seguchi Wife of Tohma Seguchi
• Tatsuha Uesugi Younger Brother of Mika Seguchi
• Tatsuha Uesugi Younger Brother of Eiri Uesugi
• Tatsuha Uesugi Brother-in-law of Tohma Seguchi