Detective Conan: I Become Rei Furuya's Cousin from the Start

【No CP + System + family bonds + good guys' side + everyone's out of character】 She transmigrates into the world of Detective Conan and becomes Rei Furuya's cousin from the start. She gets a redemption System, makes up for past regrets, joins the Black Organization, and saves the five members of the police academy group and Akemi Miyano. It's hard to read, really hard to read. I've already warned you, so please don't flame me if it's not your thing. This isn't a novel for humans; the author is made of iron. The pacing is fast, and it wraps up in a dozen or so chapters. Pure sugar, no plot ˶╹ꇴ╹˶