Games like Viola: The Heroine's Melody
Games like Viola: The Heroine's Melody include Celeste, SANABI, Eastward, WitchSpring R, and Yakuza: Like a Dragon. We matched them by the tags players give Viola: The Heroine's Melody on Steam (JRPG, 2D Platformer, Rhythm, Cute, and Story Rich): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: 2D Platformer · Female Protagonist · Pixel Graphics

SANABI
Shared: 2D Platformer · Story Rich · Action

Eastward
Shared: Story Rich · JRPG · Pixel Graphics

WitchSpring R
Shared: Cute · JRPG · Female Protagonist

Yakuza: Like a Dragon
Shared: JRPG · Action · Story Rich

Tales of Berseria™
Shared: JRPG · Story Rich · Female Protagonist

Katana ZERO
Shared: Story Rich · 2D Platformer · Action

Hyperdimension Neptunia Re;Birth1
Shared: JRPG · Cute · Female Protagonist

Touhou Hero of Ice Fairy
Shared: Female Protagonist · JRPG · Cute

NieR:Automata™
Shared: Story Rich · JRPG · Female Protagonist

Rhythm Doctor
Shared: Rhythm · Story Rich · Pixel Graphics

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Female Protagonist · Side Scroller

FINAL FANTASY® XIII
Shared: JRPG · Female Protagonist · Story Rich

Like a Dragon: Infinite Wealth
Shared: JRPG · Action · Story Rich

BLUE REFLECTION
Shared: JRPG · Female Protagonist · Cute

Clair Obscur: Expedition 33
Shared: Story Rich · JRPG · Turn-Based Combat

Gestalt: Steam & Cinder
Shared: 2D Platformer · Action · Story Rich

Muse Dash
Shared: Rhythm · Cute · Female Protagonist

FINAL FANTASY X/X-2 HD Remaster
Shared: JRPG · Story Rich · Turn-Based Combat

Webbed
Shared: 2D Platformer · Cute · Pixel Graphics

Ruined King: A League of Legends Story™
Shared: Story Rich · Female Protagonist · RPG

Tomb Raider Game of the Year
Shared: Female Protagonist · Action · Story Rich

Undertale
Shared: Story Rich · Pixel Graphics · Funny

Symphony of War: The Nephilim Saga
Shared: Story Rich · Tactical RPG · Female Protagonist