Rum's Spring&Dungeon: Idle RPG

R&SGames

In-app purchases

About this game

Rum's Spring & Dungeon is an easy-to-play idle RPG with plenty of depth. Train your favorite heroines, build your base, and blaze through dungeons at up to 20x speed!

◆ Game Features
・Fully automatic dungeon battles at up to 20x speed!
・No in-game ads—just you and the adventure!
・Simple, one-handed controls in portrait mode!
・Idle progression with plenty of ways to strengthen your characters!
・Easy to enjoy in just 3 minutes a day!
・Beautiful heroines brought to life by our dedicated illustrator!
・No additional downloads required!

▼ Story
For ages, humanity has fought against the Evil God, who seeks its destruction.
To protect Yuina, a girl chosen as humanity's ultimate weapon, Rum confronted the Evil God—and was defeated and sealed away.
But the Evil God was wounded too, and the world found a brief moment of peace.
Now, Yuina sets out to rescue Rum, determined to save the one who fought in her place...

Rescue Rum, the captive girl, and embark on an adventure to save the world!

▼ Into the Dungeon! Blazing-Fast 2D Auto-Battles!
Train your team and venture into the dungeon where the Evil God is said to slumber!
Watch your chibi characters explore and battle automatically. Keep upgrading them during combat to push even farther!

▼ Foray Mode: Roguelike Tower Defense?!
Take your trained characters through a series of events and defeat enemy bosses!
Plan around your characters' strengths and costs as you fend off incoming enemies. Both strategy and luck shape every run!

▼ Packed with Idle Features!
Upgrade the Scarecrow on the Home screen to improve training efficiency and earn more EXP over time!
In Base Mode, unlock new areas of the map, gather materials, and build facilities that automatically produce useful items and EXP.
Exchange your materials for rare items used to upgrade buildings and strengthen your characters!

▼ Bring Your Whole Roster Into Total War!
Rescue the girls who sacrificed themselves to seal away the Evil God's minions!
In this special mode, all your characters unleash their full power for 30 seconds. Train and strengthen your team before taking on the challenge!

▼ Meet the Developers
We're a husband-and-wife indie team from Japan. We handle everything ourselves, from planning and development to design, illustration, and ongoing updates.
Your support and encouragement keep us going. Thank you for playing!

Official X (posts in Japanese): x.com/RumsSpringStaff

Official website: global.rumsspring.com/en/

▼ Recommended for Players Who:
・Enjoy idle RPGs with long-term character progression
・Love dungeon crawling, roguelike modes, and tower defense
・Want quick sessions during commutes or breaks
・Enjoy collecting and training anime heroines
・Prefer one-handed, portrait-mode games
・Love watching their characters grow stronger and their damage numbers climb

▼ Recommended Devices
Google Pixel 3a or later
RAM: 4 GB or more

What’s new

・Limited-time 5-Star Serine summon rerun until Oct 27, 2026.
・Added Halloween Koakuma & Mii Skin, available until Nov 24, 2026.
・Fixed incorrect character info when re-entering the Dungeon.
・Added English and Simplified Chinese support.
・Improved notifications and data stability.
・Fixed other minor issues.