The .7z file you mentioned is a compressed archive. It is likely a backup or portable version of the game files or its associated Art Photo DLC.
The game has a 60% positive rating based on 15 user reviews on Steam. Peach Territory.7z
You play as Xiao Xuan, who enters a hidden "peach blossom realm" after jumping off a cliff. The plot follows his journey as he falls in love, cultivates his skills, and attempts to defeat a devil. cultivates his skills
The main draw is a collection of nearly 1,000 rendered pictures of female characters in various costumes and poses. Peach Territory.7z