A girl sent from the future to save the past crash lands in a place where it never stops snowing. Shortly after, a passerby prevents her from accidentally committing suicide in her sleep. I guess that's enough to make two people friends, right?

Life through the eyes of a couple of 13-year-olds.

Off to school we go. Gensokyo is bored, and sends Koishi outside to entertain them. What happens is anyone's guess...