Is this a hidden level quest..?

No, I did something like reaching level 6 and it's gone. I thought it would appear after about 2 days, but since it didn't come, I gave up.. I thought there would be 2 or 3 hidden quests, but ㅠㅠ You'll be short on cash in the early game, but.. Instead of saving, it's best to upgrade and AFK for 4 hours.. Collect everything from events, upgrade tenants to get more money, and if you even raid the diamond convenience store, you can barely manage.. But there's something about changing the neighborhood development reward into hearts, and that's the hardest part. And they keep asking me to find keys, so I've memorized the neighborhood. Have fun playing.. If you do the hidden quests and time quests, you get about 30k gems. I didn't do the ad hidden quests because they were annoying.