The game includes daily routines or "lifestyle" segments where you can observe or interact with the heroine in casual, domestic scenarios (e.g., studying, relaxing).
The term "ecchi" refers to content that is erotic or suggests sexual playfulness without necessarily being explicit. When this is set in a "misshitsu," or private room, the scenario becomes highly intimate and exclusive. The private setting amplifies the sense of secrecy and forbidden pleasure, making the experience more thrilling and personal. shishunkina kurokami shoujo to misshitsu ecchi hot