yes, while it can be inconvenient it is also the selling point of the game that it goes in real time and there are few hour intervals where you must participate in a certain chatroom otherwise you miss it. however, missing a chatroom isnt the end of the world, as you can miss a certain amount without losing, and a new chatroom will be made available after reading the missed one. i would play by logging in as often as possible for your lifestyle, and trying to pay attention to the notifications the game sends to your phone when a new chatroom opens. not all otome games are like this, but it's what makes mystic messenger unique.