Can't find the webtoon

It's a webtoon, it's isekai, there's the letters e, d, s and maybe w and r. I'm pretty sure it begins with Ed... The guy knows the future because it's a game he played, he saves a blue haired shortie who's a genius and a blind guy, with black hair (he's not really blind but he has his eyes closed most of the time), he's super strong with a sword.