Nurse Angel Ririka SOSNurse Angel Ririka SOS.

Nurse Angel Ririka SOS (ナースエンジェルりりかSOS, Nāsu Enjeru Ririka EsuŌEsu) is a Japanese manga series created by music producer and television writer Yasushi Akimoto and manga creator Koi Ikeno. The manga was serialized in Shueisha's shōjo manga magazine Ribon from January 1995 to June 1996, and subsequently collected into four bound volumes published by Shueisha. The story follows Ririka Moriya, an elementary school student who receives the power to transform into the legendary guardian, Nurse Angel.