20,000 Yalms Under the Sea  

20,000 Yalms Under the Sea
[Key Item] A tale about how the protagonist, Nene, builds a submarines all by herself and plunges it into the darkest depths of the Senroh Sea. She describes an encyclopedia's worth of mystical deep sea creatures, and pioneers who read it report having the rank of their Mog Garden's coastal fishing net increase by one.