Primary

• Hiromu Shinbo Student of Takako Shimizu
• Hiromu Shinbo [s]Boyfriend[/s] of Takako Shimizu
• Hiromu Shinbo Owner of Sumomo
• Hiromu Shinbo Friend 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
• Takako Shimizu Teacher of Hideki Motosuwa
• Takako Shimizu Teacher of Hiromu Shinbo
• Takako Shimizu [s]Girlfriend[/s] of Hiromu Shinbo