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 story follows Ririka Moriya, an elementary school student who receives the power to transform into the legendary guardian, Nurse Angel.

Additional media produced include novelizations and a theatrical musical[2] that aired in digest form in the show's time slot after its conclusion.

Ririka Moriya is a bubbly, clumsy 4th grader who has a crush on Nozomu Kanou, a transfer student from England.

For three weeks after the anime completed, footage of the Nurse Angel Ririka SOS musical was shown in its timeslot.