That was their every night. But nothing more than that.
Until Dazai decided to abandon the Port Mafia, and Chuuya has spent the following nights alone.
One night, Dazai suprisingly arrives at Chuuya's doorstep and they repeat the old nights they spent together once more, filled with each other's warmth. Dazai unaware that, to Chuuya, they were more than just lustful sex.
A few days later, Chuuya finds out the news that he's pregnant with Dazai's child and he starts getting anxious, wondering whether or not to tell Dazai about it or just keep it to himself in fear of being rejected by his partner.
But eventually, Dazai finds out and he takes responsibility as the child's father.
As they raise the child together, both are unaware that an enemy awaits for the right moment to take the child and use it against all gifted organizations, being the most powerful and gifted human being to be born.