The long-awaited release of the new song “Rhapsody” by the four-member band “BILLY BOO” from Sendai, formed in May 2024. This song has acquired push songs (power plays) from 57 stations nationwide, and despite being released before the release, it first appeared on the Billboard JAPAN general song chart “JAPAN Hot 100” (on April 9th) (place 77th). It was an unusual achievement, as it was charted before it was released.
Additionally, the Music Video of this song will be released at 9pm on the same day the release date.
This song is the ending theme of the TV anime “The Mystery Solving After Dinner,” which airs on Fuji TV’s “Noitamina,” and includes the costumes and locations of the cast that are linked to the anime. The members’ performance scenes and cast composition enhance the story, making it a Music Video that feels like watching a single movie.

Friday, April 11th, 21:00 MUSIC VIDEO Premiere
In addition, details of the purchase bonus for the “Rhapsody” CD single, which will be released on June 4th, have been released.
[Target store/Bonus content]
■All HMV stores (including HMV&BOOKS Online/Excluding some stores) … L-size bromide
■Rakuten Books… Postcard
■Amazon.co.jp … Mega Jacket
■Seven Net Shopping… Pick
■Sony Music Shop ・・・B2 poster
■Nationwide Animate (including mail order) … Mashikaku Bromide
■BILLY BOO Support Shop… Stickers
Please check out the CD single too.
BILLY BOO is formed around KAZUKI UJIIE, a singer-songwriter with over 60 million views on social media, with a unique singing voice that will never be forgotten once you hear it. A four-member band with roots in black music, combining overwhelming mixed sounds that transcend genres with a catchy melody that captures the hearts.
“Lens,” which will be released on October 13th, 2024, was used as background music for ABEMA romance reality show “Don’t be fooled by You and the Wolf,” and ranked 6th on the Spotify Viral Chart. In addition, in February 2025, they released an EP, led by the popular live song “Bakaki.”
The new song, “Rhapsody,” is a cheering song filled with light sound, filled with unresolved unresolved feelings and messages that gently blow away negative emotions.
We can’t take our eyes off the future success of the most popular band, BILLY BOO, in 2025.
◆BILLY BOO “Rhapsody” release information
Ending theme for TV anime “The Mystery Solving After Dinner”

・Distribution link
https://billyboo.lnk.to/Rhapsody_
・CD reservation link
https://BILLYBOO.lnk.to/RhapsodyIn
¥1,650 (tax included)
SRCL-13318
・CD store-specific benefits
[Target store/Bonus content]
■All HMV stores (including HMV&BOOKS Online/Excluding some stores) … L-size bromide
■Rakuten Books… Postcard
■Amazon.co.jp … Mega Jacket
■Seven Net Shopping… Pick
■Sony Music Shop ・・・B2 poster
■Nationwide Animate (including mail order) … Mashikaku Bromide
■BILLY BOO Support Shop… Stickers
[Notes]
*The number of bonuses is limited, so they will end as soon as they run out. Thank you for your understanding.
*No distribution will be made anywhere other than the above stores. note that.
*We will inform you of the stores eligible for support stores and bonus designs at a later date.
*Please note that it may take some time for the cart to be published for each online shop.
*Amazon.co.jp, Rakuten Books, and some other online shops have “special offer page” and “special offer page” that is not eligible for bonuses.
When making a reservation, please check whether the product page you are looking for before making a reservation.
■Photograph 1 of the TV anime “The Mystery Solving After Dinner”
■BILLY BOO Profile
Formed in May 2024. With its roots in black music, this four-member band combines a unique mixed sound that transcends genre boundaries with catchy melody.
The vocalist KAZUKI UJIIE’s singing voice captivates people with his natural singing voice that will keep you on your ears once you hear it.
“Lens,” released last October, was selected as the background music for ABEMA’s “Don’t Be Deceived by You and the Wolf,” and in February this year they released their first EP, “Backlight,” and were selected for the FM802 heavy rotation in February, making it the most popular band of 2025.
YouTube: https://www.youtube.com/@BILLYBOO_OFFICIAL
X: https://x.com/BILLYBOO_offici
Instagram: https://www.instagram.com/billyboo_official/
●Information on the TV anime “The Mystery Solved After Dinner”

■Broadcast information
Starting broadcast on Fuji TV’s “Noitamina” nationwide from Friday, April 4, 2025, every Friday at 11:30pm
AT-X Starting Sunday, April 6th, 2025, broadcast every Sunday at 9:00pm
(Rebroadcast: Every Wednesday from 11:30pm, Every Sunday from 6:00pm)
■Delivery information
Unlimited viewing available on Prime Video every Saturday from April 5th, 2025
Available on TVer every Thursday at noon from Thursday, April 10th, 2025.
■Introduction
A popular novel of the same name by Higashikawa Atsuya, which has been mixed with comic adaptations, TV dramas, movies, and stage plays, has finally been made into a TV anime!
Hosho Reiko, a new detective at the National Police Station, is a young lady from the world-famous “Hosho Group.” Under Inspector Kazematsuri, the heir to Kazematsuri Motors, he is struggling with numerous incidents. When Reiko returns to her big mansion, she changes from a plain pantsuit to a dress and enjoys dinner, but every time she encounters an intricate incident, Kageyama, the “butler and driver” he talks about the whole story.
“Is the young lady’s eyes a bit sloppy?” – While pointing out Reiko’s lack of reasoning with a sharp tongue that makes him abusive, Kageyama vividly unravels the mystery of the incident.
The extremely popular mystery between a sharp-tongued butler and a lady detective duo has opened in a brilliant form an anime.
■ Official TV anime website/X
TV Anime HP:https://nazod-anime.com
TV Anime Official X:https://x.com/nazoD_anime
■Original work
Higashikawa Atsuya: “The mystery is solved after dinner” (published by Shogakukan)
■Staff
Character design: Tachibana Oreko
Director: Masuhara Mitsuyuki
Series composition: Kunisawa Mariko
Character Design: Kawada Izumi
Art settings: Yanai Kyoko, Takayama Masako, Fujise Tomoyasu
Art Director: Ogura Hiromasa
Color design: Ohno Harue
3DCG Director: Aragaki Hayato
Director of Photography: Inoue Hiroshi
Special Effects Director: Taniguchi Kumiko
Edited by: Tsukatsune Mariko
Sound Director: Shimizu Hiroshi
Music: Hahaha
Animation production: Madhouse
■Theme song
Ending theme: BILLY BOO “Rhapsody” (Sony Music Labels Inc.)
■Cast
Hosho Reiko: Hanazawa Kana
Kageyama: Kaji Yuki
Kazematsuri Kyoichiro: Miyano Mamoru
●Original information
The series has sold over 5 million copies! A very popular mystery novel about a butler detective and a young lady detective!
Original work: Higashikawa Atsuya, “The Mystery Solve After Dinner” (published by Shogakukan)
Official website of the original:https://www.shogakukan.co.jp/pr/nazoD/
Official X:https://x.com/nazoD3