Sore wa Totsuzen, Unmei no Aite ga
それは突然、運命の相手が
A government system uses genetic data to identify ideal couples for reproduction. When the younger of the two reaches 14, both receive a notice to meet at a designated center. There, they are introduced to their assigned partner and given a week to decide whether to proceed with marriage. The narrative includes several short stories, each spanning a few chapters, that explore how different pairs respond to their assigned relationships.