Even though I don't know him wellEven Though I Don't Know Him Well; Chal Alji-do Motamyeonseo; Jal Alji-do Motamyeonseo; よく知りもしないくせに; 잘 알지도 못하면서

Isaac was kicked out of his girlfriend's house on a cold night and had nowhere to go. Her brother appeared in front of him and now Isaac's going to live with him ?!