You can hear the rustle of clothes and whispers moving from ear to ear. Realistic Foley:

Information regarding gameplay mechanics or technical system requirements for running this title can be explored further if needed. Onii-chan Sen'you Delivery JKPlus (RJ01319065) - Ryuugames

The term Oniichan (Big Brother) in this context is rarely a reference to biological kinship. Instead, it functions as what sociologists call a "role-play trigger."

: The use of advanced dummy-head microphones to create a 360-degree soundstage, making whispers and ambient sounds feel physically present.