This is one of the few rebirth sorts of trope webtoons where the dude doesn't remember his past life memories and I really like how realistically it's portrayed. He's cold, but it's normal. In fact, it would be extremely strange if he wasn't cold and all of sudden warmed up to his family and friends. I really just enjoy his attitude and his personality. I think that its a breath of fresh air from all those other cheesy ones!
Thanks for translating this!