While If My Heart Had Wings -Flight Diary- is technically a fan disc for If My Heart Had Wings, it includes six stories - including the prologue and epilogue to the main story - and acts as a sort of sequel to the original.
In contrast to the original game's common route and branching storylines, this sequel divides the narrative into six standalone stories that players select from the main menu. Each story plays out linearly without any choices or branches.
The six stories include a prologue, an epilogue, and four supplementary character-focused tales. The prologue and epilogue directly continue the events of the original game, while the other stories provide additional development and side narratives for supporting characters.
Reviews praise the pacing and length of the individual stories. The shorter, self-contained routes allow for tighter, more focused storytelling, while the prologue and epilogue offer a more expansive, emotional narrative arc. Most players report completing the full experience in 20-32 hours.
Visually and aurally, the sequel maintains the high production values of the original. Reviewers laud the art, character designs, and music for capturing the series' tone. The lack of player choices also enables smooth, uninterrupted presentation of the stories.
While the linear structure reduces replayability compared to the original, players can still enjoy revisiting the varied perspectives and storylines. The ability to experience the different character-driven narratives provides good overall replayability, even if each route is more self-contained.