The protagonist is "you." When your childhood friend girl Gekkou-chan hears that you are into ASMR, she buys a "dummy head microphone" and starts researching ASMR. Then there are Akimizu-chan, who wants to be friends with Gekkou, Gekkou's older sister and mom, and your twin younger sisters. The seven characters around you are drawn to the appeal of ASMR. Three minutes = 180 seconds in which you can experience realistic sounds, including ear scratching, breathing, voices, touching squeezes, ice, water, typing, and other household sounds. Source: Crunchyroll News