Games like Nagi no Koi
Games like Nagi no Koi include Stella of The End, AI: The Somnium Files, WITCH ON THE HOLY NIGHT, ATRI -My Dear Moments-, and Marco & The Galaxy Dragon. We matched them by the tags players give Nagi no Koi on Steam (Adventure, Visual Novel, Anime, Emotional, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Stella of The End
Shared: Adventure · Visual Novel · Anime

AI: The Somnium Files
Shared: Visual Novel · Anime · Adventure

WITCH ON THE HOLY NIGHT
Shared: Visual Novel · Anime · Adventure

ATRI -My Dear Moments-
Shared: Visual Novel · Anime · Adventure

Marco & The Galaxy Dragon
Shared: Visual Novel · Anime · Adventure

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Visual Novel · Emotional · Anime

Danganronpa: Trigger Happy Havoc
Shared: Visual Novel · Anime · Adventure

Raging Loop
Shared: Visual Novel · Adventure · Anime

Summer Pockets
Shared: Adventure · Visual Novel · Emotional

GINKA
Shared: Visual Novel · Anime · Adventure

Danganronpa 2: Goodbye Despair
Shared: Anime · Visual Novel · Adventure

Fate/stay night REMASTERED
Shared: Visual Novel · Anime · Adventure

planetarian HD
Shared: Visual Novel · Anime · Adventure

Doki Doki Literature Club Plus!
Shared: Visual Novel · Anime · Gore

eden*
Shared: Visual Novel · Anime · Adventure

PARANORMASIGHT: The Seven Mysteries of Honjo
Shared: Adventure · Visual Novel · Anime

Tiny Bunny
Shared: Visual Novel · Singleplayer · Adventure

月影魅像-解放之羽-
Shared: Visual Novel · Adventure · Anime

星空列车与白的旅行
Shared: Visual Novel · Adventure · Anime

Phoenix Wright: Ace Attorney Trilogy
Shared: Visual Novel · Anime · Adventure

Mirror 2: Project X
Shared: Anime · Visual Novel · Singleplayer

Muv-Luv Alternative
Shared: Visual Novel · Anime · Violent

STEINS;GATE ELITE
Shared: Visual Novel · Anime · Adventure

The House in Fata Morgana: A Requiem for Innocence
Shared: Adventure · Visual Novel · Anime