Fear and Guilt (Souheki/Ranzai)

Every day, Dazai blames himself for Odasaku's death. He knows he didn't kill him, but still, Dazai blames himself for being too late to save his friend, one of the few people in this cruel world, who knew and understood what he was going through. The day Oda died, it was raining, and it was one of the reason why Dazai hated the rain. He joined the famous ADA in order to fulfill Oda's wishes, and maybe try and find a reason to live. And he found it. It wasn't actually a reason, but people. Akiko Yosano and Edogawa Ranpo were one of them. Dazai still wants to commit suicide, but he fears that if he does, whoever cares about him will be sad, and he doesn't want them to be. Ever. But Ranpo and Yosano are yet to find out Dazai's horible past and the imaginable pain he had to endure.