Doctor Mario was in his office when suddenly there was an urgent phone call. It was Daisy. "Mario, come quick. Luigi's very sick." "I'll be there right now, Daisy", Mario told her. Nurse Peach was very concerned. "What's wrong, Mario?" "Luigi's sick", he answered with worry. "Go", Peach told him kindly. "I can take care of things here." "Thanks, Peach". He gave her a kiss and then rode over to Luigi and Daisy's house. Daisy hugged Mario and led him upstairs. "Hey little brother", he smiled at Luigi. Luigi smiled back. He loves his big brother Mario. No one understood the brotherly bond between them. Mario felt Luigi's head. It was warm. For the next few days, he took care of his sick brother. A week later, Luigi was cured. After they paid Mario the fee, Luigi and Daisy thanked him. "Anything for you guys", he said with a wink. Then he had to go back to the office. The Mario brothers did their special handshake and then he left. Mario was thankful for his brother Luigi. Glad you feel better little bro, he thought with a smile.