Voltage Inc. (Headquarters: Shibuya-ku, Tokyo; President: Yuji Tsutani) announces the opening of the Heartwarming Event 2025 "Eternal Pledge to Protect You" at Yurakucho Marui from Wednesday, December 24, 2025.
This event delivers heartwarming experiences to fans through various themes. In its third year, the event titled "Eternal Pledge to Protect You" offers deeper moments of excitement.
The venue features specially illustrated oversized visual boards, numerous displays of memorable illustrations and dialogue with beloved characters, and photo spots galore.
As a special project, Exclusive Knight Certificates are available featuring a total of 153 characters. Each certificate contains "A Pledge of Devotion to You" spoken by each character, allowing visitors to enjoy the bond between them in real life.
The event runs for a limited time until Monday, January 12, 2026 (national holiday). Visit Yurakucho Marui and enjoy special moments with your favorite characters.
Event Site: https://the-chara.com/blog/?p=106199
Official Volfes & Heartwarming Event X (@Volfes_Volkyun): https://x.com/Volfes_Volkyun
Heartwarming Event 2025 Overview
Event Name
Heartwarming Event 2025 "Eternal Pledge to Protect You"
Period
December 24, 2025 (Wednesday) - January 12, 2026 (Monday/National Holiday)
*Closed: December 31 (Wednesday) - January 3 (Saturday)
Venue
Yurakucho Marui 8F (2-7-1 Yurakucho, Chiyoda-ku, Tokyo)
Contents
Exhibits, photo spots, exclusive knight certificate sales, and merchandise
Admission
Free
*Admission restrictions may apply during busy periods.
Special Project: All 161 Types! Exclusive Knight Certificates - Pledges to Protect You
Introducing all 161 types of Exclusive Knight Certificates featuring 153 beloved characters as pledges to protect you! Feel the strong emotions from your favorite character and the bond between you both ♥
Introducing Some of the Merchandise Available at the Venue!
Merchandise featuring the event's key visual, along with many new items from participating titles, will be available for purchase.
[Key Visual]
Acrylic Card (Random)
Price: 660 yen (tax included)
Total: 8 types
Size: 60mm×90mm
*Random selection - design cannot be chosen
[Key Visual]
Aurora Mini Acrylic Art
Price: 3,300 yen (tax included)
Total: 1 type
Size: 128×182mm
[Masquerade Kiss -Dangerous Bargain-]
Acrylic Stand
Price: 1,870 yen each (tax included)
Total: 4 types
Size: Approx. H105mm×W110mm or smaller
[Tenka Touitsu Koi no Ran Love Ballad -Hana no Shou-]
Can Badge (Random)
Price: 550 yen (tax included)
Total: 16 types
Size: Approx. 56mm diameter
*Random selection - design cannot be chosen
[Mirror Princess Love Palace]
Acrylic Plate
Price: 1,760 yen each (tax included)
Total: 14 types
Size: B7
[Neon Clash -Echoes of the Lost-]
Acrylic Keychain
Price: 1,210 yen each (tax included)
Total: 5 types
Size: Large: W24mm×H70mm / Small: W20mm×H50mm
Purchase Benefits
During the event period, receive one randomly selected Prize D for every 3,000 yen (tax included) purchase at the venue! Additionally, enter a lottery for a chance to win Prizes A-C and the Lucky One Prize.
[Prizes]
Prize A: Extra Large Acrylic Figure (Made to Order) - 161 types
Prize B: Large Can Badge - 8 types
Prize C: 2L Bromide - 8 types
Prize D: Mission Card Dedicated to You - 153 types
*Prize A is made to order and will be shipped after the event ends.
*Prize C is randomly distributed - design cannot be chosen.
*Prize D allows title selection, but design cannot be chosen.
◆Lucky One Prize
An acrylic card featuring the same design as Prize D's Mission Card. You can choose your favorite character's design.
*Lucky One Prize is made to order and will be shipped after the event ends.
App Collaboration Project & Latest Updates
[Makai Ouji to Miwaku no Nightmare]
Event-linked Avatar Gacha & Card Gacha Now Available!
The "Glass Exclusive Knight Costume" worn in the event key visual is now available as an avatar! Additionally, a card gacha featuring key visuals from the 2023 and 2024 Heartwarming Events is also available. Don't miss this opportunity to GET them♪
[Period]
■Avatar Gacha
December 21, 2025 (Sunday) 12:00 PM - January 21, 2026 (Wednesday) 11:59 PM
■Card Gacha
December 26, 2025 (Friday) 10:00 PM - January 31, 2026 (Saturday) 11:59 PM
Makai Ouji to Miwaku no Nightmare Nintendo Switch™ Ports - 2nd and 3rd Titles Release Confirmed!
Following the first Nintendo Switch™ port released in September 2025, "Makai Ouji to Miwaku no Nightmare Temptation's Kiss," the release of the 2nd and 3rd titles featuring other character routes has been confirmed. The 2nd title features Rio, Lance, Dear, Lou, and Akia, while the 3rd title features Jasper, Tino, Knight, and Glass! Details including release timing will be announced sequentially through in-app notices and official social media. Continue enjoying Makai Ouji to Miwaku no Nightmare on Nintendo Switch™♪
[2nd Title Product Overview]
Title: Makai Ouji to Miwaku no Nightmare -Magical Kiss-
Platform: Nintendo Switch™ (Download-only software)
Supported Languages: Japanese / English
Publisher: Voltage
Content (Planned): From "Makai Ouji to Miwaku no Nightmare"
・Part of the Harem Route
・Chapter 1 of Rio, Lance, Dear, Lou, and Akia's routes
[3rd Title Product Overview]
Title: Makai Ouji to Miwaku no Nightmare -Sweet Kiss-
Platform: Nintendo Switch™ (Download-only software)
Supported Languages: Japanese / English
Publisher: Voltage
Content (Planned): From "Makai Ouji to Miwaku no Nightmare"
・Part of the Harem Route
・Chapter 1 of Jasper, Tino, Knight, and Glass's routes
*Both 2nd and 3rd titles are products in development, so details may change.
[Mirror Princess Love Palace]
Heartwarming Event 2025 Collaboration Gacha Now Available!
BD illustrations distributed from November 2024 to October 2025 appear as merchandise at the Heartwarming Event 2025 venue♪ To commemorate the merchandise release, the app features the gacha "Memories of His Jacket Selection," allowing you to display the costumes he wore♡ Don't miss items only available during this opportunity!
[Period]
December 24, 2025 (Wednesday) 12:00 PM - January 12, 2026 (Monday/National Holiday) 11:59 PM
Chocolat Anniversary Campaign Season 2 Confirmed!
Chocolat Anniversary Campaign Season 2 with renewed benefits is confirmed. Give chocolate to your favorite character and get exclusive benefits available only here! Opening: Scheduled for early February 2026
[Chikai no Kiss wa Totsuzeni Love Ring]
Heartwarming Event 2025 Collaboration Set On Sale!
A special set featuring dress avatars inspired by the princesses served by exclusive knight characters♪ Don't miss this great opportunity!
[Period]
December 24, 2025 (Wednesday) 12:00 PM - January 12, 2026 (Monday/National Holiday) 11:59 PM
Chikai no Kiss wa Totsuzeni Love Ring - New Year Project Starts January 1st (Thursday)!
Starting with a super value lucky bag containing hair and kimono avatars, this year features two New Year frame gacha releases perfect for the New Year season♪ Enjoy the luxurious lineup celebrating the new year.
[Oji-sama no Propose Eternal Kiss]
Heartwarming Event 2025 Collaboration Gacha Now Available!
Mini characters wearing key visual costumes appear♡ Enjoy displaying many cool knight mini characters♪
[Period]
December 24, 2025 (Wednesday) 12:00 PM - January 12, 2026 (Monday/National Holiday) 11:59 PM
Ryu Main Story & His Perspective Release Confirmed!
The long-awaited "Ryu Main Story: Beginning of Love -His Thoughts-" release is confirmed for late January 2026. What were his feelings at that time, in that moment──? "Once I knew your warmth, I can't let go anymore..."
New illustrations accompany his thoughts written from his perspective, delivering feelings for "You." Don't miss it♡
[Vol Pass] Heartwarming Event 2025 Commemoration Rewards Added!
To commemorate the Heartwarming Event 2025, wallpapers and social media icons of characters appearing in the key visual have been added as Vol Pass rewards!
Additionally, new AR camera rewards to enjoy within the venue appear♪ These are limited-time rewards, so don't miss them!
[Reward Exchange Period]
December 24, 2025 (Wednesday) 11:00 AM - January 31, 2026 (Saturday) 11:59 PM
*Company names, product names, and service names mentioned are trademarks or registered trademarks of their respective companies.
