"Everyone's Choice! Electronic Comic Award 2026" Grand Prize Winner "Mother-in-Law's Teachings" (AlphaPolis) Becomes a Music Video with Music by Shinjiro Shirakami, Produced by Shota Horie (PHYZ), and Sung by Nagi Yanagi!

NTT Solmare Corporation (Headquarters: Chuo-ku, Osaka; President and CEO: Toshiaki Asahi; hereinafter referred to as NTT Solmare), which operates "Comic Seymour," one of Japan's largest comprehensive e-book stores, is proud to announce the 11th installment of its "ONGA PROJECT" on YouTube's "Seymour Channel." This project features the grand prize-winning work of "Everyone's Choice! Electronic Comic Award 2026," "Mother-in-Law's Teachings" (Manga: Sora Hounoki, Composition: Mamesuke Fujimaru, Original: Toru/AlphaPolis). The song, produced by Shota Horie (PHYZ) with lyrics, composition, and arrangement by Shinjiro Shirakami, will be performed by Nagi Yanagi, a popular artist known for numerous anime theme songs, and will be released as a music video.

The highly anticipated 11th ONGA PROJECT continues the collaboration with Shota Horie (PHYZ), who also began his activities as the Vocaloid creator "kemu" and is currently highly active in the anime and internet scenes.

Furthermore, Shinjiro Shirakami, active as a singer-songwriter with a diverse range of experience, is responsible for the lyrics, composition, and arrangement.

Nagi Yanagi, a singer-songwriter whose delicate vocal quality, once heard, is unforgettable, and whose impressive song worlds are supported by a growing fanbase, participates in the vocals. The completed music video further enhances the world of "Mother-in-Law's Teachings," offering a different impression than reading the electronic comic.

The "ONGA PROJECT" is an official secondary creation music project that expands and accelerates the possibilities of manga by combining various manga originals with the inspiration of creators, under the theme of "Ongaku x Manga" (Music x Manga).

Comic Seymour will continue to strive to make manga more accessible to a wider audience through content like this program, guided by the vision of "Expanding the passion for manga through emotion and technology."

1. About the "Mother-in-Law's Teachings" Music Video

Now available on YouTube's "Seymour Channel."

<Music Video Details>

- Title: "Mother-in-Law's Teachings"

MANGA INSPIRED MUSIC "Let's Hold Hands"

- Vocals: Nagi Yanagi

- Lyrics, Composition, Arrangement: Shinjiro Shirakami

- Production: Shota Horie (PHYZ)

- Release Date: July 1, 2026 (Wed)

- URL: https://youtu.be/8uofZSoZH9w

2. Creator/Artist Profiles

Nagi Yanagi

A singer-songwriter who began her music activities in 2006.

In 2009, she was invited by supercell to serve as guest vocalist under the name "nagi."

In February 2012, she made her solo major debut with the ED theme "Bidoromoyou" for the TV anime "Waiting in the Summer."

Her first album "Ewalu," released on July 3, 2013, ranked 4th on the Oricon weekly charts.

On December 9, 2020, she released her fifth album "Emerarotype."

On February 23, 2022, she released the "Nagi Yanagi 10th Anniversary Selection Album -Roundabout-."

Celebrating her 10th anniversary as a solo major artist in 2022, she announced 10 projects, held monthly 10th-anniversary live concerts from March to December, released new songs digitally every other month, and released her sixth album "Branch" on December 23.

On March 20, 2024, she released her seventh album "White Cube."

On June 26, 2025, to commemorate her 20th anniversary in music, she will release the album "ENcore," which features newly arranged and re-recorded songs from her doujin mini-albums that were previously out of print.

In 2026, she announced the launch of her new project "Green Light." Titled "A story that wanders through mysterious dreams and illuminates the truth," it will unfold through three elements: an "original album," a "game," and a "solo live tour." The album, released on February 28, will feature songs deeply linked to the story of a game distributed on smartphones and Steam, allowing listeners to experience it through both music and in-game experiences. The project will expand through the album, game, and solo live tour, with the "story that wanders through mysterious dreams and illuminates the truth" depicted in music unfolding three-dimensionally through various expressions.

She has also worked on insert songs for dramas and music for games, not limited to anime. For the TV anime "Just Because!," she participated as a music producer, handling the opening and ending themes as well as the background music.

In addition to releasing numerous songs, she actively engages in activities such as nationwide tours and special live events.

Her delicate vocal quality, once heard, is unforgettable, and her impressive song worlds are supported by a growing fanbase.

Shinjiro Shirakami

Singer-songwriter, Trackmaker, Bassist

After various activities centered around his own band, he transitioned to solo activities. He handles almost all production processes himself and also creates artwork such as sculptures, paintings, and photographs. His songs are regulars on Spotify's major playlists, and his unique musicality, along with his lyrical talent for vividly depicting society, complex love, and human relationships, is supported by many music fans and artists, including collaborations with manga works.

While active as a singer-songwriter, his activities are diverse, including supporting other artists as a bassist, lyricist, composer, and recording engineer.

He was instrumental in the establishment of PHYZ Inc. and will assume the position of Director in 2025.

Shota Horie

Lyricist, Composer, Arranger, Performer.

He began music production activities in 2011 as the Vocaloid creator "kemu."

He has also been active as the bassist and producer for the five-member band "PENGUIN RESEARCH" since their major debut in 2016.

He is involved in many artists and works as a lyricist, composer, arranger, performer, and producer, primarily in the anime and internet scenes.

In 2025, he founded PHYZ Inc. and assumed the position of Representative Director.

PHYZ

A creator team launched by music creator and producer Shota Horie (kemu).

With the theme of practicing and inheriting organic creativity born from dialogue,

it is composed of various artists, from emerging talents to veterans, without a fixed framework.

3. ONGA PROJECT 11th Installment Commemorative Campaign

To commemorate the 11th installment of the ONGA PROJECT, Comic Seymour will be holding a campaign offering special deals on target works.

Mother-in-Law's Teachings: 1st volume free

Mother-in-Law's Teachings (Serialized): 6 volumes free

Mother-in-Law's Teachings (Light Novel): 2 volumes free & 30% OFF

Period: July 1, 2026 (Wed) 00:00 - July 14, 2026 (Tue) 23:59

URL: https://www.cmoa.jp/campaign/pickup/260701_mmhhnkkre/

4. Work Introduction

"Mother-in-Law's Teachings"

Publisher: AlphaPolis

Authors: Sora Hounoki / Mamesuke Fujimaru / Toru

Work URL: https://www.cmoa.jp/title/311488/

"Mother-in-Law's Teachings (Serialized)"

Publisher: AlphaPolis

Authors: Sora Hounoki / Mamesuke Fujimaru / Toru

Work URL: https://www.cmoa.jp/title/299565/

"Mother-in-Law's Teachings (Light Novel)"

Publisher: AlphaPolis

Authors: Toru / Noz

Work URL: https://www.cmoa.jp/title/1101380485/

Synopsis: Misaki Yamazaki, who passed away from illness. However, when she opened her eyes, she had been reincarnated into the world of a manga she had read in her previous life. What's more, she was reincarnated as the wicked stepmother character who abused the protagonist in her childhood... She regained her memories of her past life the day before her wedding, with no escape. She resolved to try not to abuse her stepchild, and when she met her stepchild, she was incredibly cute!!! As she struggled with parenting using her knowledge from her past life, her extremely cold husband's attitude began to change...!? She'll even become a cheat for her stepson! Changing the childcare situation in another world with the power of love and otaku knowledge, a unique parenting fantasy begins!

5. Overview of Comprehensive E-book Store "Comic Seymour"

"Comic Seymour" continuously improves its services and expands its functions based on the vision of "Expanding the passion for manga through emotion and technology."

(1) One of Japan's largest comprehensive e-book stores, celebrating its 21st anniversary with over 40 million monthly users!

(2) Extensive selection with over 1.89 million titles, primarily comics.

(3) "Seymour Comics" produces and distributes over 2,400 original comic titles, including popular works adapted into dramas and anime.

(4) Offers diverse services such as "Seymour All-You-Can-Read."

(5) Over 4.42 million customer reviews, the largest in the industry.

(6) Offers over 61,000 free titles and over 1,400 advantageous campaigns.

≪All figures are as of May 31, 2026≫

6. About NTT Solmare Corporation

NTT Solmare aims to "provide fresh surprises and deep impressions to customers, contributing to the creation of a prosperous society" by operating "Comic Seymour," one of Japan's largest comprehensive e-book stores, producing original comics through "Seymour Comics," operating "MangaPlaza," one of the largest e-manga distribution stores in North America, and developing popular mobile games like the "Obey Me!" series.

Official Website: https://www.nttsolmare.com/

Business Overview Site: https://www.nttsolmare.com/about/

E-book Business

- Operation of "Comic Seymour," one of Japan's largest comprehensive e-book stores

Official Website: https://www.cmoa.jp/

- Development of "Seymour Comics," a leader in digital publishing

Official Website: https://www.cmoa.jp/cmoacomics/

- Comic Seymour CM "Too Much Manga! Largest in the Industry!!"

Official Website: https://www.cmoa.jp/cm/

- Operation of "MangaPlaza," one of the largest e-manga distribution stores in North America

Official Website: https://mangaplaza.com/

<Inquiries Regarding This Matter>

●NTT Solmare Corporation

E-book Business Division, Tada, Nakamoto

e-mail: info@nttsolmare.com