Nanako SOSNanako SOS.

Nanako SOS (ななこSOS, Nanako Esu-ou-esu) is a Japanese manga series created by Hideo Azuma. It initially ran in Popcorn and Just Comic (both published by Kobunsha) from April 1980 to July 1985 and later continued as a Doujinshi in Azuma's Sanchoku Azuma Magazine, running irregularly from July 2001 to August 2016. The series was adapted into 39-episode anime television series produced by Kokusai Eiga-sha which aired on Fuji TV between April 2 and December 24, 1983.