Watch the first episode: the Bump
AU INFO: When chuuya and dazai we're on a mission when they we're 18, chuuya got hit from an ability, the ability made children with their current crush/lover, they children start at the age of 2 they, and then they grow up like normal kids, when dazai left the Mafia, he knew nothing about the children, or chuuya getting hit with the ability, and 4 year's later dazai still don't know about the children, chuuya has then hidden from the port Mafia because of mori,
(Most of this was inspired by some!, I forgot their tag but when i find them again I'll mention them!!)
Aiko oldest: ability is "human no more" so she can't die, inless of old age, it only goes to 120yrs
Akiro middle: ability is "of the tainted sorrow" gravity manipulate, like chuuyas
Aimi youngest: ability is "no longer human" disables any ability with a single touch, like dazais
Btw none of the kids know dazai is their father!! Chuuya doesn't speak of dazai at all!