>>713968268
Ame no Marginal (189 reviews)

https://store.steampowered.com/app/348950/Ame_no_Marginal_Rain_Marginal/
https://vndb.org/v16695

Visual novel by the author of Narcissu, about a guy being alone with a girl in a strange empty world where it always rains.

Possibly of interest to >>714009884, but obviously nothing lewd happens.