World star Rain was recently appointed as the main model for skincare brand, "Mentholatum". Despite his busy schedule, the singer was able to take some time off to shoot a CF for the company. The staff were surprised and impressed when they saw Rain preparing in advance for the CF shoot, such as performing sit-ups and push-ups in order to maintain his buff body for the actual filming. A representative expressed, "Rain showed so much humility throughout the shoot that we couldn't feel that he was a world star at all, and the staff praised him a lot for that." Meanwhile, Rain has been busily filming for his new movie, "Red Muffler", which also features Shin Se Kyung, Yoo Jung Sang, Kim Sung Soo, and Jung Suk Won. [gallery columns=4] Source: TV Daily via Nate