I feel like I’m going crazy

I swear on webtoon there was this manhwa where there is an og transmigrated mc and the transmigrated mc(main mc) who both join a party, but the main mc finds out that the original heroines of the story has been k!lled and that the entire party was replaced by guys. The og transmigrated mc was trying to destroy the world or something(I only read the 1st episode). It was called something like ‘the hero’s party of full of guys’. I searched on webtoon and on the internet but I can’t find it anywhere!! I swear it exists!