The atmosphere is usually designed to be calming, nurturing, or intense, depending on the focus of the specific production.

The setting is almost entirely internal, focusing on the interactions within a single household.

Within hentai discourse, the series is hailed as a "Masterpiece" for fans of the "Onee-chan type"—the older, dominant, yet caring sister archetype. The dynamic here works because the brother is not a stereotypical "Ugly Bastard." He is an average young man, which allows for easier viewer self-insertion.