The Prince's Proposal: Eternal Kiss Celebrates Its 13th Anniversary With Royal Grand Prix 2026 Voting and More

The Prince's Proposal: Eternal Kiss, one of Voltage's Volkoi romance titles, marks its 13th anniversary this September. The title lets players experience a dramatic romance with a prince, and has built a devoted fanbase since launch with its glittering royal-world setting, its dramatic storyline of love across a difference in status, and its charming cast of characters.

To thank the fans who have supported the game, in-app voting for the Royal Grand Prix 2026 — where players vote for their favorite love interest — opens today, September 1 (Tuesday). The anniversary lineup also includes a special release of the "Prologue" chapter of Episode0, the series depicting the story of the founding kings and the start of the Noble Alliance, along with anniversary events featuring the princes and supporting characters.

A companion campaign is running at the same time on the free membership points site VOLTAGE Passport, adding limited-edition prizes featuring the 13th anniversary key visual, a point-boost campaign, and a Love Pass bonus for new account linking.

Official Site: https://products.voltage.co.jp/apps/ouji2/

Official X (@official_oujiek): https://x.com/official_oujiek

Anniversary Campaign Lineup

1. Royal Grand Prix 2026 – My Favorite Prince

Voting has opened today for the once-a-year Royal Grand Prix 2026 – My Favorite Prince, where players vote for their favorite love interest. Players who vote for their favorite character can obtain limited-edition avatars and other premium items.

Voting Ticket Acquisition Period: Now through September 24 (Thursday) at 11:59 PM

Voting Period: September 1 (Tuesday) 12:00 PM through September 25 (Friday) 11:59 AM

Check the in-app special page for the exact start and end times of ticket acquisition and voting.

2. Episode0 Prologue: The Story of the Noble Alliance's Founding

The Episode0 series, which tells the story of the founding kings, has been well received by fans. A special "Prologue" chapter unraveling the origins of the Noble Alliance is released today.

Story Release: September 1 (Tuesday), from 5:00 PM

3. Anniversary Events, Parts 1 and 2

Two special limited-time stories celebrating the 13th anniversary are being released as anniversary events, split into a first and second half. The princes appear in the first half, and supporting characters appear in the second.

Part 1 (Princes): September 1 (Tuesday) 5:00 PM through September 13 (Sunday) 11:59 PM

Part 2 (Supporting Characters): September 14 (Monday) 12:00 PM through September 24 (Thursday) 11:59 PM

4. Special Anniversary Exchange Shop Opens

A limited-time exchange shop opens where players can trade "Keys," an event item earned by playing the anniversary events, for special avatars and other premium rewards.

Open Period: Starting September 1 (Tuesday) at 12:00 PM

5. Casino Collection – A Big Haul of Items

The popular Casino Collection returns for this year's anniversary, offering a chance to stock up on useful in-app items, including Full Course items, at a discount.

Period: September 1 (Tuesday) 12:00 PM through September 23 (Wednesday) 11:59 PM

6. Anniversary ロイコレ Avatar Gacha

A special avatar gacha called Anniversary ロイコレ is being released, featuring the love interests from the 13th anniversary key visual reimagined as adorable "chibi" avatars.

Period: September 1 (Tuesday) 12:00 PM through October 1 (Thursday) 11:59 AM

7. Special Snap Contest

A limited-time snap contest celebrating the 13th anniversary is being held. The player crowned "No. 1 Queen" will receive a congratulatory comment from the familiar character Pierre.

Period: September 1 (Tuesday) 12:00 PM through September 7 (Monday) 11:59 PM

8. Anniversary Sale

As a thank-you to fans for their everyday support, an anniversary sale bundling premium items at a discount is being held in two parts.

Part 1: September 1 (Tuesday) 5:00 PM through September 13 (Sunday) 11:29 PM

Part 2: September 14 (Monday) 12:00 PM through September 24 (Thursday) 11:29 PM

9. A Congratulatory Message From Him

During the anniversary period, every player who opens the app and visits their My Page will receive a congratulatory message from their love interest.

Availability: Sometime in September

VOLTAGE Passport Runs a 13th Anniversary Campaign, Too

VOLTAGE Passport ("VolPass"), the free membership points site where everyday heart-fluttering moments earn points, is running an anniversary campaign for The Prince's Proposal: Eternal Kiss.

Note: Points only accumulate on VolPass for usage after linking an account. Anyone without a VolPass account will need to register first.

VOLTAGE Passport Official Site: https://passports.voltage.co.jp

1. Numerous VolPass-Exclusive Celebratory Prizes

To mark the anniversary, a range of prizes available only through VolPass are being added, including a VolPass-exclusive avatar, a 13th anniversary key visual wallpaper, a limited postcard, and an anniversary commemorative stamp.

Prize Exchange Opens: Starting September 1 (Tuesday) at 12:00 PM

The celebratory prizes remain exchangeable after September as well.

2. Royal Grand Prix Point-Boost Campaign

Players who purchase an in-app item or log in while linked to VolPass during the campaign period will receive a significantly larger amount of VolPass points than usual.

Period: September 1 (Tuesday) 12:00 AM through September 30 (Wednesday) 11:59 PM

3. Five Love Passes as a Gift

Everyone who newly links VolPass with The Prince's Proposal: Eternal Kiss during the campaign period will receive five "Love Passes," an item used to progress through in-app stories.

Period: September 1 (Tuesday) 12:00 AM through September 30 (Wednesday) 11:59 PM

About The Prince's Proposal: Eternal Kiss

The Prince's Proposal is a royal love story that lets players experience a dramatic romance with princes.

The franchise's first title launched in 2010, and with the support of many fans, a social app version followed in 2011. The Prince's Proposal II launched in 2013 (its title changed to The Prince's Proposal: Eternal Kiss in 2025), and The Prince's Proposal: Eternal Kiss launched in 2016.

The Prince's Proposal: Eternal Kiss depicts a story set 50 years after the world of the social app version.

The Prince's Proposal: Eternal Kiss

■ Pricing: Free to play (with in-app purchases)

■ Compatible Devices: iOS 11.0 or later / Android OS 7.0 or later

May not be available on some devices.

■ Copyright: ©Voltage

Company names, product names, and service names mentioned are trademarks or registered trademarks of their respective owners.