the one in Jin-Woo's lap's feed

I'm in the living room and it's currently 11 pm here. my family are all upstairs sleeping already and I heard a bell rang again huhuhu ╥﹏╥ I once shared here that I heard a bell at night. Also we don't have a doorbell or anything related to bell so I looked outside but there's nothing cause it's the middle of the nightttttttt