How do I get Class EXP in Z Route: Redemption?

The game lists these sources: Season Building, Defeat Zombies and Season Pass.

Which building gives Class EXP?

Season Building: Upgrade Season Building.

Class EXP (10K), which gives 10,000 Class EXP.

Class EXP in Z Route: Redemption comes from 3 sources in the game data (building, world map and season). 3 bag items hold it.

Season resource: the sources below are season content and may change between seasons.

SourceTypeHow

Season BuildingBuildingUpgrade Season Building

Defeat ZombiesWorld mapDefeat Zombies that appear during the season

Season PassSeasonPurchase Season Pass

Using these items adds the amount shown. Chests marked “Depends on Base level” scale with your Base, so the game data has no fixed amount for them.

ItemGives

Class EXP (1K)1,000 Class EXP

Class EXP (10K)10,000 Class EXP

Class EXP (100)100 Class EXP

How do I get Class EXP in Z Route: Redemption?: The game lists these sources: Season Building, Defeat Zombies and Season Pass.
Which building gives Class EXP?: Season Building: Upgrade Season Building.
What is the biggest Class EXP item?: Class EXP (10K), which gives 10,000 Class EXP.