Well, without more details about this 'first breeding dex story', it's really difficult to provide a proper account. It might be a story related to the first entries in a breeding database for some kind of creatures. Maybe it involves the discovery of how to breed certain species and the early records of their breeding characteristics.
I'm not entirely sure which specific 'first breeding dex story' you are referring to. There could be many breeding dex stories in different contexts like in Pokemon or other fictional universes. Can you be more specific?
The 'first breeding dex story' is quite an ambiguous term. If it's in the context of a game, perhaps it could be about the first set of breeding information added to a Pokedex - like how the first Pokemon were discovered to breed, what the initial conditions were, and how it changed the understanding of Pokemon breeding in the game world. However, since we don't have more context, this is just speculation.
If you want the clearest chapter reference, go to Chapter 70. Early on, So, under the curious gazes of everyone, Jiang Yan strutted up with his...; later, the chapter leans on He didn't even take off his sunglasses before he started reading into the....
If you want the clearest chapter reference, go to Chapter 49. Early on, My phone!!!" Jiang Yan's roar echoed continuously through the mountains in...; later, the chapter leans on Watching helplessly as his latest-model phone was taken away by a....
A practical answer is Chapter 37, because it turns the idea into a concrete scene. The chapter opens with The barrage was suddenly filled with hahas, but the two guests present..., adds pressure through The moment her gaze landed on her, she couldn't help but pause., and ends on I look forward to.
Look to Chapter 63 for the clearest answer. It begins with During those seven days, he thought he had completely escaped from that..., keeps building through But now it seemed he hadn't., and lands on It was already past midnight, but the conference room at Xingmei....
The best chapter pointer here is Chapter 73, "Does Someone Like Jiang Li Deserve to Have a Fan Club?". It opens with Director Sun, tongue-tied, finally managed to squeeze out a sentence,... and closes on Despite Wen Jiaojiao's fiery temper, there were still many who were drawn....
Chapter 3 is the strongest chapter-level answer because it starts from Qiao was still annoyed at the attitude of this unknown girl when she heard... and follows through on Jiang Yan, forced into a marriage with someone he did not love, had....
Look to Chapter 40 for the clearest answer. It begins with [Jiang Li claims she copied this herself?, keeps building through But her calligraphy is actually this pretty?] [Jiang Li dares to boast,..., and lands on The handsome guys on this show are so difficult to deal with..
The best chapter pointer here is Chapter 63, "Far Exceeded Expectations!". It opens with During those seven days, he thought he had completely escaped from that... and closes on It was already past midnight, but the conference room at Xingmei....
A practical answer is Chapter 59, because it turns the idea into a concrete scene. The chapter opens with After walking for about two or three hundred meters, the old man stopped..., adds pressure through Your brother might just be kind enough to take you in., and ends on My phone, my cigarettes.
If you want the clearest chapter reference, go to Chapter 31. Early on, Before Shen Lan had reached the backyard, she already heard the sounds of...; later, the chapter leans on Facing the freshly risen morning sun, she noticed at a glance the girl....