Suashi no Houkago (Little Mermaid Series EPISODE. 1) (1985)

Suashi no Houkago is the first episode of the Little Mermaid Series of OVAs. Miiko is a shy, mousy artist who goes to Midorigaoka Junior High School. Her best friend is Nami, a tennis player who she is also deeply in love with. Nami teases Miiko about her crush, but Miiko is heartbroken after seeing Nami has a boyfriend. Later on, Miiko runs afoul of a teacher named Ms. Shizuka, whom is in love with her. Miiko navigates through this love rhombus in hopes of winning Nami's heart.