Youkai Fudoki

In the Nara era when the youkai were fine, a gentle and cute girl, Oisoume Taime, promises to marry Orosnake to help a frog that is likely to be eaten by Orosnake. Then, the maiden who avoided the big snake that came to the house by closing the door helped the crab caught by the grandfather by offering money and a kimono the next day. A big snake that came back that night broke through the roof and invaded the house, making Taime-chan a big pinch...!?