Dazai had been in captivity since he was a year old. Sirens who were meant to travel in packs, he was alone. He was used to being alone. The aquarium he was in starred him in everything. He was the main money maker. That was until chuuya was captured. Chuuya was thrown into the same tank as Dazai. Dazai ignored him not knowing how to interact with another Siren... Chuuya became the favourite often getting all the good food and attention... Dazai began to get ignored... forgotten. Dazai not knowing how to interact with sirens didn't know anything. He didn't know about mating or what it was like to be generally cared for. One day during feeding after the staff gave chuuya the biggest fish they could, in return Osamu got scraps... chuuya waited for then to leave before taking the last big fish offering it to Dazai "Here, it's not fair how their treating you... yknow?"