New Idle Mobile Game 'Yulgang: Hiryu Den' Based on the Popular 'Yulgang' IP in Korea and Japan

SESISOFT Co., Ltd. announced today, July 16, 2026, the official Japanese launch of the idle RPG 'Yulgang: Hiryu Den'.

The game is available for download from Google Play and the App Store.

· Apple Store

https://apps.apple.com/app/id6502438838?mt=8

· Google Play

https://play.google.com/store/apps/details?id=com.cle.yulgang&hl=ja

Currently, 'Yulgang: Hiryu Den' is offering a special legendary companion, 'Snow Princess', inspired by Yuki-onna—one of Japan's iconic yokai—as a commemorative gift for the Japanese launch. Players can receive it simply by playing the game.

Additionally, players can 100% obtain various essential rewards for early progression, including companion summon tickets and martial arts summon tickets.

◆ What is 'Yulgang: Hiryu Den'?

'Yulgang: Hiryu Den' is an idle mobile RPG developed based on the popular martial arts comic 'Yulgang', which has achieved cumulative sales of 8.5 million copies. A key feature is the faithful integration of characters and storylines from the original work into the game. Players can freely combine diverse martial arts skills and companions to create their own unique character builds. The game also features an optimized idle system tailored for mobile devices, allowing players to easily level up their characters anytime, anywhere, without complex operations. The game also delivers thrilling martial arts action sequences.

◆ Two Campaigns to Commemorate the Official Launch!

To celebrate the official launch, SESISOFT is running a Follow & Retweet campaign and a Countdown campaign on its official X (formerly Twitter) account. Winners will be selected by lottery and awarded special event prizes.

◆ In-Game Events Also Live!

Various in-game events are currently active, including login events, a 'Zoo Field Trip Event', and a 'Beat the Heat Event'.

1. Zoo Field Trip Event & Beat the Heat Event

By completing event missions, players can earn event currency.

This event currency can be exchanged for coins required for the 'Zoo Field Trip Summon'. Furthermore, these coins can be used to exchange for various items, including companion summon tickets and martial arts summon tickets.

2. Login Event

Throughout July, various login events are being held. Simply logging in daily grants luxurious rewards such as costumes and various summon tickets.

Details can be found in the in-game announcements.

About 'Yulgang: Hiryu Den'

'Yulgang: Hiryu Den' is a new idle RPG that completely reconstructs South Korea's premier martial arts comic 'Yulgang', with cumulative sales exceeding 8.5 million copies, for the mobile platform.

Faithfully recreating the emotional journey of protagonists Han Fei-gwan and Tan Hwa-rin, the game adopts an idle system and optimized UI that allows even busy modern players to easily grow their characters anytime, anywhere, without complex controls.

With this official launch, the game aims to re-energize the global wuxia gaming community across Asia and beyond, showcasing the enduring charm and presence of the original 'Yulgang' IP.

Title: 'Yulgang: Hiryu Den'

Genre: Idle RPG

Release Date: July 16, 2026

Price: Free-to-play (with in-app purchases)

Platform: App Store, Google Play

Official Website: https://yulgang-jp.sesisoft.com/

Copyright: Yulgang ⓒ 2025 Jeon Keuk Jin/Yang Jae Hyun, Dominus Games Inc. © SESISOFT Co., Ltd. © CLE Games Co.,Ltd. All rights reserved.

Developer: SESISOFT / CLE GAMES

※ Information in this news release is current as of the announcement date. Changes may occur without prior notice.

※ Images are from a development version and may differ from the final product.

※ When using logos or images, please include the copyright notice.

※ Data charges may apply when using the content. Data charges are the responsibility of the user.

※ Apple and the Apple logo, App Store are trademarks of Apple Inc., registered in the U.S. and other countries.

※ Google Play and the Google Play logo are trademarks of Google LLC.

About SESISOFT

SESISOFT Co., Ltd. (http://www.sesisoft.com)

Founded in 2009, SESISOFT (Headquarters: Seoul, South Korea) is a game development and publishing company.

In Korea, SESISOFT operates over 10 titles, including 'Heavenly Inscription M', 'KonoSuba: Fantastic Days M', and 'Nine Clouds Dream M'.

Additionally, the company has been actively expanding into the Japanese market, launching the martial arts mobile MMORPG 'Heavenly Inscription M' in Japan in 2025.