Instead of spending chapters establishing how two characters met and built trust, creators use the childhood relative angle. The characters already know each other's flaws, secrets, and habits, allowing the romance to accelerate naturally.
Romantic storylines in this genre typically follow a specific emotional arc: 1. The Domestic Honeymoon Phase sex shinseki no ko to o tomari dakara
The phrase roughly translates to (or "Psychic World"). Instead of spending chapters establishing how two characters