Izana happily sits at his desk at school and writes the 15th letter in a couple of days to his adopted brother Shinichiro. Shinichiro has become everything he has and everything he wants. Shinichiro is his older brother and only his. After writing the letter, he stands up and goes outside to throw it in the mailbox. Afterwards, he happily runs to the auto repair shop where Shinichiro works, but his heart breaks with pain when he sees Shinichiro talking to his other brother, his real brother, Mikey... Izana bites his lips (Shinichiro can only belong to me)... different thoughts rush through his head