Difficult to meet friends

My high school friends came to kong-ju and we decided to meet at Kongju National University's back door in 5:30 pm. However, when I get there in 5:30 pm, there was only one friend, although there should be 3 of my friends. So I called them why they are not comming. One said that his ant died, so he went to kwang-ju. and the other said he is so tired that can't drink. another said that he join after having dinner with his parents.