as far as i know this will be the last season and it will be a sad ending. The author plans to create another story with nakyum and seungho set in another lifetime.
momo: Oh my g** we are gonna have to wait for another season aren't we
So is there a possibility that Yuki Tsukumo is still alive? Because when Choso was asked where is Yuki, he said that all he knows is that Noritoshi still lives.