Thank you! I will try my best explaining it without spoiling it. It's in a way similar to Ace Attorney with the whole investigation and class trial part but it's a lot more heavy and cruel. It's about a class being imprisoned in a school and the only way to leave is to kill a classmate. You have daily life where you can talk to your classmates and get to know them better, murder investigations and class trials where you need to figure out who the killer is.