The Sure Winner - S1.E10

A student bets away his allowance at the horse races. After helping him win once, Moguro offers to help him one more time, as long as he never bets again. Later, after bragging about his win, the student is forced to accept ten million yen from a gangster in a bar to bet at the races. However, before he meets Moguro on the next race day, he gambles all the money and loses.