A game I installed last year is showing a hidden quest??

I installed this merge game last year to do the treasure quest+ hidden quest but deleted it. Recently, it appeared in my treasure quest list, so I re-downloaded it to play when I don't have energy for other merge games. After playing for a few days, a hidden quest suddenly appeared. I'm currently level 21, so I don't know if I can reach level 25, but I'll give it a shot.