Lianxi Sheng Cong Tushou Pi Zhuan Kaishi

A mercenary named Han Lan is transported to another world after being hit by a mortar shell, ending up in the body of a male idol trainee about to participate in a performance. In this world, popular male idols are typically slim, attractive, and have light skin. He questions why someone strong and tanned cannot be an idol, believing a real hero should be able to break bricks with his bare hands.