Games like Under the Sky World~Another~
Games like Under the Sky World~Another~ include Summer Memories, Touhou Mystia's Izakaya, Yokai's Secret, Natsu no Sagashimono What We Found That Summer, and Pretty Neko. We matched them by the tags players give Under the Sky World~Another~ on Steam (Hentai, Casual, RPG, Sexual Content, and JRPG): closest matches first, and among equally close ones the better-known games.

Summer Memories
Shared: Hentai · Sexual Content · RPG

Touhou Mystia's Izakaya
Shared: Casual · RPG · Pixel Graphics

Yokai's Secret
Shared: Sexual Content · Casual · Hentai

Natsu no Sagashimono What We Found That Summer
Shared: Hentai · Sexual Content · RPG

Pretty Neko
Shared: Casual · Sexual Content · RPG

Yarimono
Shared: Hentai · Sexual Content · RPG

Lost
Shared: Casual · Sexual Content · Hentai

Swaying Girl
Shared: Hentai · Sexual Content · RPG

West Sweety
Shared: Hentai · Sexual Content · Casual

Cookie Clicker
Shared: Casual · Incremental · Pixel Graphics

Stardew Valley
Shared: RPG · Pixel Graphics · Casual

Dusk Pub - Adult Only
Shared: Hentai · Sexual Content · Casual

Pretty Angel
Shared: Casual · Hentai · Sexual Content

your wife
Shared: Hentai · Sexual Content · Casual

Seek Girl Ⅳ
Shared: Casual · Sexual Content · Hentai

DAVE THE DIVER
Shared: Casual · Pixel Graphics · RPG

Bound by Love
Shared: RPG · Hentai · Sexual Content

Dragon Cliff
Shared: RPG · Casual · Incremental

Seek Girl Ⅵ
Shared: Hentai · Sexual Content · Casual

Dream Date
Shared: Hentai · Sexual Content · Casual

Wet Girl
Shared: Casual · Sexual Content · Hentai

Your Mom
Shared: Hentai · Sexual Content · Casual

Seek Girl Ⅶ
Shared: Hentai · Sexual Content · Casual

NEKOPARA Vol. 1
Shared: Hentai · Sexual Content · Casual