Onegai! Señorita (2005)
- Onegai! Señorita (お願い! セニョリータ; Please! Lady)
- Nettai Night (ねったいナイト; Tropical Night)
- Hai! Moshimoshi... Natsu Desu! (はい!もしもし・・・夏です!; Yes! Hello, It's Summer Here!)
- "Onegai! Señorita" was the CM song for "MATCH" beverage. Thus, the song has three versions for its music video: a monochrome version, the "MATCH" CM version (in which the band is transported in cardboard boxes to a concert), and one featuring the band singing in black suits in a train (Yamato used the same suit he had used in the Densha Otoko debut).
- This is the last single produced with drummer and founding member Katchan.
- "Hai! Moshimoshi... Natsu Desu!" was the first song accredited to Naoto's group "Soy Sauce".
- "Onegai! Señorita" was produced in less time than "Love Parade", which was produced during the New Years season. Naoto explained that the reason was because they had to wait until summer to make "Onegai! Señorita". Hiroki said they wanted a "'Hot summer in Spain' image."
- "Nettai Night" is connected to the first song, the image reflected is a hot, desert night. Yoh said with this song, "I want the people to hear the bass in this song."
- Pop star Saori sang the "loli vocals" for "Hai! Moshimoshi... Natsu Desu!"; Hiroki and Naoto wrote the lyrics side-by-side based on the theme "Words you want to say to a girl."
- In the Ura Shopping version of "Hai! Moshimoshi... Natsu Desu!", pop singer Minami Akina replaces Saori for the lyrics.