A rich man learns of a treasure in a swamp and forces his servants to drain it. Tatsuko goes to a shrine in the mountain every night seeking eternal beauty. The black dragon, who is the master of a huge swamp, wants to marry the beautiful Kurohime.
Tatsuko could only be beautiful 
when she was all alone.
Mantenía su belleza solo cuando estaba sola.
Solo era bella cuando estaba sola.
Tatsuko só poderia ser bela
quando estivesse sozinha.