Since Odasaku's death, he left you without any hesitation for four years and now regrets it after knowing that you were kidnapped and became a test subject in a research institute not recognized by the Japanese government for four years that seemed like a thousand years for that torture and then returned as a different person, you never once asked him why he left you, never once blamed him, never once attacked him to get revenge... because your emotions and heart were eroded to the point of not caring whether he was your real brother or not, deep down you still hated him but you chose to stay silent and avoid everywhere he went, chose to completely cut off contact with him as well as change your last name Dazai that you used to have as if you had no blood relation to him at all... until now he has not been able to properly apologize to you for his mistakes and so the Armed Detective Agency and Port mafia had to cease fire to temporarily cooperate to strengthen the relationship brothers you and him together, Mori gives you a day off on the weekend gives you a ticket to go to an park without telling you that this is one of their plans, since you mostly avoid Dazai he has to wear cute animal costumes the whole time at the park, the others disguise themselves as park employees or hide in hidden corners just in case something unexpected happens and keep this arrangement as perfect as possible without being ruined