Announcement of the Nationwide Collaboration Campaign between 'MANKAI STAGE『A3!』ACT3! ～SPRING & SUMMER 2026～' and 'ROUND1'

Creative Plus Inc., a subsidiary of M-Upholdings Inc. (Headquarters: Shibuya-ku, Tokyo; Representative Director: Hiroichiro Mioto), which handles content distribution and collaboration using character and anime IP, and ROUND1 Japan Inc. (Headquarters: Osaka City, Osaka Prefecture; Representative Director and President: Eiji Kawaguchi), which operates the comprehensive entertainment facility 'ROUND1 (ROUND1)', have decided to hold a collaboration between 'MANKAI STAGE『A3!』ACT3! ～SPRING & SUMMER 2026～' from June 26, 2026 (Fri) to August 16, 2026 (Sun). We would like to inform you of the details below.

This collaboration will feature the sale of collaboration packs (for karaoke and sports only), collaboration drinks and food, the deployment of collaboration rooms in karaoke, the implementation of singing campaigns, X follow & repost campaigns, and more at ROUND1 target stores nationwide.

In addition, the sale of original goods at some stores and order-based sales through EC sites are also planned.

■ Collaboration Overview

Title: 'MANKAI STAGE『A3!』ACT3! ～SPRING & SUMMER 2026～ × ROUND1 Collaboration Campaign'

Period: June 26, 2026 (Fri) to August 16, 2026 (Sun) [Total of 52 days]

Venues: ROUND1 stores nationwide * Stores handling original goods: 7 stores

EC shopping period: July 3, 2026 (Fri) to September 30, 2026 (Mon)

Scheduled shipping: November 2026 and later (online sales)

Campaign special site

https://www.round1.co.jp/collaboration/msa3_act3_ss26-round1/index.html

■ Collaboration Contents

＜Event Contents＞

・Sale of original goods (7 stores)

・Sale of collaboration packs with B4 visual mats (karaoke and sports)

・Sale of collaboration drinks and food

・Sale of drinks with stage ticket-style clear cards

・Sale of arranged drinks and collaboration popcorn at sports facilities

・Deployment of collaboration rooms (2 stores: Kichijoji store, Umeda store)

・Installation of table stands and large panels in collaboration rooms

・Broadcasting of collaboration CMs on in-store signage, LED, and karaoke room monitors, etc.

＜Campaigns＞

・Karaoke singing campaign

・Original goods must-buy campaign

・X follow & repost campaign

*Note: Implementation contents vary by store.

*Note: Implementation and display contents may change without notice. Please understand in advance.

*Note: Please check the collaboration special site for details, precautions, and target stores.

Special site

https://www.round1.co.jp/collaboration/msa3_act3_ss26-round1/index.html

■ Original Goods

Original goods will be sold at some ROUND1 stores.

In addition, order-based sales will also be implemented through EC sales from July 3 (Fri) to September 30, 2026 (Mon), so please use them together.

・Sales stores: Total of 7 stores

Kichijoji store

Umeda store

Nara Mi・Nara store

Chikusa store

Sendai Izumi store

Ikebukuro store

Senbonmatsu store

*Note: Please check the store's official X for stock status.

*Note: Sales stores may change.

*Note: Depending on the congestion situation, we may implement queuing or ticket distribution.

*Note: Please refrain from gathering late at night or early in the morning as it may cause trouble to nearby residents.

*Note: We do not accept direct reservations at the store (counter reservations).

*Note: Please refrain from contacting the store.

・Original goods introduction special site

https://creativeplus.co.jp/special/msa3_act3_ss26-round1/

・Reservation sales: EC site 'Cocoani'

https://cocoani.jp/

EC shopping period: July 3, 2026 (Fri) to September 30, 2026 (Mon)

Shipping: Scheduled to be shipped sequentially from November 2026

■ Details of Original Goods

・Rocker key-style acrylic keychains (12 types) each 1,430 yen (tax included)

・Hologram can badges (12 types) single item 660 yen (tax included)

・Clear photo seals (2 types) each 880 yen (tax included)

＜Scheduled to start sales on July 17, 2026 (Fri)＞

・Die-cut acrylic blocks (12 types) each 1,650 yen (tax included)

【Purchase Bonus】

During the period, a postcard will be given as a present for every purchase of 2,500 yen (tax included) or more!

*Note: One postcard will be given randomly from all 12 types

*Note: The purchase bonus will end as each type runs out.

*Note: The product is an image. The actual product may differ.

■ What is 'MANKAI STAGE『A3!』'?

Since its launch in 2017, the popular actor training game『A3!（Ace Three）』has surpassed 8 million downloads. MANKAI STAGE『A3!』, which stages the popular work with a story about reviving a once-glorious but now dilapidated theater company by training actors and succeeding in stage performances, has been a topic of conversation nationwide since its opening in 2018 and is now affectionately known as『A3! Stage』by many fans.

■ What is the popular actor training game『A3!（Ace Three）』?

The popular actor training game『A3!（Ace Three）』distributed by Liber Entertainment has surpassed 500,000 pre-registrations and achieved 8 million downloads as of April 2023. In addition to collaboration developments with commercial facilities and the holding of events, it is attracting attention through various media such as a wide range of goods and CD sales. It's a popular work that's currently a topic of conversation!

"Director! Please... make us bloom!"

In a suburb of Tokyo, there is a town called Velvet (Velvet). This town has a street called『Velvet Way』, which is a holy land for theater company members. Relying on a sudden letter that arrived, you, a former stage actor, have come to this land. What you encountered was...【・In debt!・No customers!・Only one company member!】A dilapidated theater company that has lost its former glory! You, who happened to revive the company, are appointed as the president and『general director』...? The long-awaited main story fourth part is being favorably distributed!

■ Copyright Notice

©Liber Entertainment Inc. All Rights Reserved.

©MANKAI STAGE『A3!』Production Committee

※Reference Information

・M-Upholdings Inc.

Representative Director　　　　　　Hiroichiro Mioto

Headquarters　　　　　　　　　10F, Shibuya South Tokyu Building, 18-12-3 Shibuya, Shibuya-ku, Tokyo

Business Content　　　　　　　Content business, EC business, electronic ticket business, other businesses

URL　　　　　　　　　https://m-upholdings.co.jp/

・Creative Plus Inc.