Eunhyuk thinks that life is all about rules. Because when he follows his own rules, he can´t get hurt. Eunhyuk wants to stick to that and protect the secret that makes him vulnerable, secret so big that nobody is supposed to find out until the day he dies. And then there is someone very carefree and to Eunhyuk´s chagrin, this exact person happens to find out. Yes, Donghae knows the secret.