I Woke Up to Find That My Archenemy and I Had Divorced [Double Black]

When Nakahara Chuuya wakes up, he discovers that he has transmigrated to an absurd parallel world. In this world, he and Dazai Osamu are divorced. Nakahara Chuuya: Someone like that bastard getting divorced is perfectly normal. But first... why was he married to that guy in the first place?! Mini Scene: Nakajima Atsushi: "Dad, Father lost his wallet again. We don't have breakfast, and my sister and I are so hungry." Nakahara Chuuya: They even have kids? Akutagawa Ryuunosuke: "Dad... I miss Father. Can I go see him?" Nakahara Chuuya: ??? This parallel world is way too absurd, isn't it??? Double Black Pre-Release 1: The Mackerel Won't Leave Me Alone After He Dies Five years after Dazai Osamu's death, Nakahara Chuuya receives Dazai Osamu's final letter. After that, strange things start happening around Nakahara Chuuya. A cold breeze often brushes the back of his neck; Documents he just signed turn up in the shredder; The alcohol in his glass disappears out of nowhere... Nakahara Chuuya: "Atsushi! Is the Port Mafia... haunted?" Nakajima Atsushi suddenly perks up: "Is it Mr. Dazai?!" Nakahara Chuuya: ???!!! For the backstory, see the neighboring story, Lower Your Head to Kiss Me. Reading it is optional. Double Black Pre-Release 2: The Difficult-to-Capture Hot-Tempered Young Lady (The main story is told from Chuuya's perspective.) One day, Dazai Osamu unexpectedly obtains a romance System. If his affection score reaches one hundred percent, he can bring back a friend. The reward is tempting, but something seems off about the target. Seeing the -100 affection score beside someone's name, he falls into thought. No worries. It's just a little slug. Getting the affection score to one hundred percent should be a piece of cake, right? But is there something wrong with this romance guide? System: "Sweetie, we're professionals." Dazai Osamu: "Skip the tutorial." System: "Sweetie, this is a new-player bonus. You can't skip it." Dazai Osamu: "..." Do you know him better, or do I? Theme: Raising kids