Games like One Manga Day
Games like One Manga Day include Tricolour Lovestory, 人间 The Lost We Lost, Gaokao.Love.100Days, Dream Date, and West Sweety. We matched them by the tags players give One Manga Day on Steam (Free to Play, Visual Novel, Anime, Nudity, and Simulation): closest matches first, and among equally close ones the better-known games.

Tricolour Lovestory
Shared: Visual Novel · Nudity · Anime

人间 The Lost We Lost
Shared: Nudity · Simulation · Visual Novel

Gaokao.Love.100Days
Shared: Visual Novel · Nudity · Anime

Dream Date
Shared: Nudity · Simulation · Casual

West Sweety
Shared: Nudity · Simulation · Indie

Crimson Imprint plus -Nonexistent Christmas-
Shared: Visual Novel · Nudity · Anime

Summer Pockets
Shared: Visual Novel · Anime · Adventure

Sakura Spirit
Shared: Visual Novel · Anime · Nudity

Some Some Convenience Store
Shared: Visual Novel · Anime · Indie

NEKOPARA Vol. 0
Shared: Anime · Visual Novel · Nudity

Epiphyllum in Love
Shared: Visual Novel · Indie · Casual

妄想症:Deliver Me
Shared: Visual Novel · Indie · Simulation

NEKOPARA Vol. 1
Shared: Anime · Nudity · Visual Novel

Miracle Snack Shop
Shared: Visual Novel · Anime · Simulation

Summer Memories
Shared: Nudity · Anime · Visual Novel

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

Pretty Angel
Shared: Nudity · Anime · Casual

Shan Gui (山桂)
Shared: Visual Novel · Anime · Indie

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

Tiny Snow
Shared: Visual Novel · Anime · Indie

Fox Hime Zero
Shared: Visual Novel · Anime · Indie

Sunrider: Mask of Arcadius
Shared: Visual Novel · Free to Play · Anime

泡沫冬景
Shared: Visual Novel · Anime · Adventure

Fluffy Store
Shared: Visual Novel · Anime · Indie