The main girl Nagare is suspended from school and decides to visit Nagasaki and then she gets caught in a murder case. It's a fun little mystery ova and it won't have you scratching your head about who the culprit is. It has it's little twists but nothing crazy. If anything I enjoyed the male main character the most in this show. Your main characters are Nagare Seiko and her cat Gonbei, and a guy named Misora Chuta. Nagare is a strong willed girl who for some reason doesn't like Misora and treats him harshly all the time. She's kind of a tsundere tohim in a way. Now Misora is what made me like this ova more. He adds most of the comedy to the show and he never gives up on Nagare and he has an air of mystery to him that makes him a cool character. This ova is dated but it is a good little time killer and it's only 50 minutes. Give it a shot.