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- Hakuchuumu (白昼夢; Daydream)
- Tamai Kenji, Tobinai Masahiro
- Other Information
- Arrangement: Tamai Kenji, Tobinai Masahiro
- Programming: Tobinai Masahiro
"Hakuchuumu" is a pop song recorded by Aimer. It first appeared as track #2 on Aimer's second mini-album, Dareka, Umi wo. EP. The song was used as the theme for TV Asahi's Tokyo Joukyuu Date 2.