The Global Temperature Is High, I Lead a Girl Group to Travel Around the Mountains and Rivers

(No rebirth, no space.) The greenhouse effect leads to global high temperatures and an extreme shortage of food and drinking water. Chen Yang travels through a parallel world and kills people to activate the system. He can get redemption points by killing people and redeem materials from the system. The protagonist kills people to accumulate redemption points while leading all the beauties to travel around the mountains and rivers.