Hidden Quest

Time Quests seem to disappear so quickly~ When I first started playing, I wasn't interested in hidden or action quests, but after a few days of doing time quests and then they're gone.. nowadays, even while doing time quests, I find myself aiming to complete hidden quests~ But then again, to complete a hidden quest, you have to reach the target level, so I guess I end up playing the game without realizing how much time has passed~ Hahaha I've cleared up to level 99 in this game and only level 100 is left.. it's damn hard to clear lolll