The Architecture of a Sigh

Works with this title structure generally explore several recurring themes common in adult visual novels and manga: 1. Corruption of the "Pure"

A specific event or a particular character (often the protagonist or a rival) initiates a shift in her environment. This shift introduces "pleasure" (kairaku) into her daily routine.

(e.g., is this from an anime, game, song, or social media post?), I can give you a complete, accurate post about it.