A brand new way of speeding up early leveling was introduced to kRO known as the Juno Monster Society. Specialized NPCs are located through out the world which gives adventurers kill quests for that particular map in exchange for experience. What is unique is that these quests can be endlessly resetted if you bring Carbonated Waters to the NPC.

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In each major city, you will find a pair of NPCs, an Assistant and a Carbonated Water Vending Machine.

• Talk to the Assistant to get a quest that enables you to take any map hunting quest.
• Talk to the Vending Machine to buy Carbonated Water for 50,000z (non-discountable)
• The Assistant can teleport you to any map with kill quests for 1 Carbonated Water.
• You take quests from the Map Examiner located in the table below where you have to kill 80 monsters from that map.
• Map kill quests naturally reset off cooldown at 4:00AM Korean time.
• You can reset the specific map kill quest quicker by bringing the Map Examiner 3 Carbonated Waters.

You can search for the Map Examiner and Assistants via navigation:

• 조사관 - Map Examiner (22 locations)
• 보조관 - Assistant and Carbonated Water Vending Machines (8 locations)

Tip:

• Some maps contains monsters required for Eden Group Leveling Quests so you can earn even more experience.

Sources:
http://www.inven.co.kr/board/ro/1951/4991
http://www.inven.co.kr/board/ro/1951/4993