TLDR Government assigned couplings are mean to reproduce, MC's crush is taken by a classmate and he can't do anything despite given a chance. At the end he laments not doing anything then snaps out of it, it's Yukina his own coupling, a 10/10 IMO. Author plans a sequel with Yukina.
[Yoru no Honya (Yoru)] Forced Coupling Low Birthrate Countermeasures Act NTR >In the near future, the declining birthrate has become a serious problem... >The government has enacted the Forced Coupling Law, calling it an unprecedented measure to combat the declining birthrate. >It is a system in which AI selects the most suitable partner based on various factors such as grades, athletic ability, and physical compatibility, pairs them up, and makes them give birth at a young age. >Even couples who are currently dating are not exempt...