The best way to probably play Mystic Messenger during school is you can check it in between classes. As chat rooms mostly appear with at least an hour in between, so you can easily access the chat rooms without worrying about missing them. If mobile phones are banned in your school the best way is to sneak in the mobile and take it somewhere people won’t notice you using it. As most chat rooms in casual and deep stories are short so they won’t take up much time. This method may not work in chat rooms in another story and in Jumin’s route as they are way too long and you would miss your class so these stories and routes aren’t recommended during school. To overcome this you can also buy max speed which can benefit you, this can help you save time or you can open a chat room and let it run. We have provided the answers above so you don’t need to worry about which answer needs to be selected. In case you have missed any chat room you can just let it run and save it when the chat room is over. If you are not able to check chat rooms in between classes, you can check them during lunch. However, this may cause you to lose out on many chat rooms during the day. But you can surely use it to your advantage and unlock all the bad relationship endings first and then move over to good/normal endings when your school gets over.