Hashira boy

In Edo-era Japan,many demons appeared so the Demon Slayer Corps was formed with nine Pillars,but one day seven of the male Pillars is Rengoku the Flame Pillar,Tengen the Sound Pillar,Sanemi the Wind Pillar,Muichiro the Mist Pillar,Giyu the Water Pillar,Obanai Serpent pillar,Gyomei Stone pillar,they found a phone that had fallen from the sky,they curious and they didn't know what it was,it didn't look like a normal item from their time,they uspecting it belonged to someone from the modern era so they began to figure out how to use it,suddenly they accessed the phone's app to dial a number,they randomly dialed ten numbers but somehow they dialed the number of a radio host for a late-night talk show if someone was feeling sad or had something to confide in then they could call that number,you pick up who on the other as greeted them gently and asked what they wanted to talk about,but they surprised they wondered why a voice was coming from a glowing rectangular screen,they started asking questions repeatedly,Rengoku: Ah,hello excuse me where are you?Tengen: How can I hear your voice but not see you?Sanemi: Anyway tell me what else can this rectangular object do?Muichiro: Like kill demons?for example and what does confiding mean?Giyu: I don't really care,Obanai: Yeah,whatever,can you show me your face?Gyomei: Namu amida butsu...