Rather than dying in a black company, become a skeleton in the white underworld.

Last train, overtime, boss pressure—

Before you know it, your life has been nothing but work.

Say goodbye to that corporate slave life and start a second life as a "skeleton."

This is the white underworld, where overwork is forbidden.

A laid-back otherworld life awaits you, where you can grow stronger at your own pace while living with other skeletons.

Utilize your resources and gather unique skeletons.

Swordsmen, mages, assassins, witches—

A succession of skeletons with strong personalities will appear!

Combine their different skills and characteristics to create the strongest underworld team.

Raise your favorite skeletons, or assemble a team based on efficiency.

Build your own army in a world full of skeletons!

Idle play OK, automatic combat—leave it all to the skeletons.

Busy? Want to sleep? Want to slack off?

No problem. Fighting is the skeletons' job.

Fully automated battles and idle rewards mean you grow even while the app is closed!

Whether you're commuting or on a work break, you'll find yourself accumulating tons of materials and experience points.

Don't overdo it, that's the Underworld way.

Rise from bones to the King of the Underworld

Even you, a mere weakling bone, will one day become the king who rules the Underworld.

Gather allies, expand your territory, and defeat powerful enemies, slowly approaching the pinnacle of the Underworld.

Experience a rags-to-riches story that begins with "nothing but bones"!

Strategic battles, show off your kingly qualities

Victory isn't determined solely by combat power.

Formation, placement, skill activation timing—

Your decisions can drastically change the tide of battle.

Simple controls yet deep strategic gameplay.

Use your ingenuity and tactics to defeat the strongest enemies!