Complex sentence: Afterwards the boy follows his father to a whorehouse where he waits outside for his father, eats food from the garbage and befriends a puppy who is chained in the alley.
Split into simpler sentences: Afterwards the boy follows Yuuji to a whorehouse where he waits outside. While waiting, he eats food from the garbage and befriends a puppy who is chained in the alley.