Primary

• Yumi Oomura [s]Girlfriend[/s] of Hiroyasu Ueda
• Yumi Oomura Co-worker of Hideki Motosuwa

Extended

• Hideki Motosuwa Student of Takako Shimizu
• Hideki Motosuwa Owner of Chii
• Hideki Motosuwa Friend of Hiromu Shinbo
• Hideki Motosuwa Co-worker of Yumi Oomura
• Hiroyasu Ueda [s]Boyfriend[/s] of Yumi Oomura
• Hiroyasu Ueda Boyfriend of Yumi Oomura