Shuichi doesnt want to do anything to hurt Yuki, and he would do anything to protect Yuki, he would even quit bad luck. Yuki resolves the Tachi situation, and he arealises something in Yuki's eye. Yuki needs to get away from Shuichi and his stress, and he knows that if he tells Shuichi to go alone, he will come back again. He decides to go away, what will Shuichi do when he hears the news?....that hes getting married. (thetvdb.com)