Class 17 Classmates' Time Travel Story

This is a group of young people who can travel through time while playing cards. They came from the magical class of Class 17 in high school. Ah, yes, a group of them. After entering college, they got together to play cards during the winter vacation, but were suddenly tasked with saving the world (?). I can't watch dramas or browse Weibo or play "Defend Carrot". I don't know how to pass the time – ancient times were really boring. From time to time, we have to sit down - can't we travel in a decent way? This way we will have no one! Right! Ah! And what's the matter with so many familiar faces? Hey, even if it's an NPC, don't pick on the teachers' faces, okay? Can you still play happily? All in all, this is a funny but loving adventure.