Riku Sawada (沢田りく, lit. Sawada Riku) is a young student who attends Syoyo High School. He had the second best grade in end of terms exam.
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| Maki • Kyoko Misawa • Yū Miyama • Shizuku Mizutani • Yoshino Mizutani • Asako Natsume • Natsume's Ex-Colleagues • Saeko Ninomiya • Yamase • Chizuru Ōshima | |
| Andou • Haru's Father • Issei Joujima • Kitano • Masahiro Ayanokouji • Mitsuyoshi Misawa • Mizutani Takashi • Takaya Mizutani • Samejima • Sōhei Sasahara • Seda • Shimoyanagi • Ryuuji Tomioka • Kenji Yamaguchi • Haru Yoshida • Yuuzan Yoshida | |
| Dog • Mimi • Nagoya • Shizuku's Golden Fish | |