Yusuke Hina's abrupt demise prior to the story's onset reverberates through its emotional landscape and interpersonal conflicts. He served as both closest confidant and artistic counterpart to the protagonist, their competitive yet collaborative bond forged through shared cinematic ambitions at a university film society. Yusuke’s accidental death occurred during the final stages of crafting an intensely personal movie project, leaving the work permanently incomplete.

His absence fractures survivor relationships: a grieving younger sister fixates blame upon the protagonist, while fellow filmmaker Mahiro Sendo confesses to witnessing his fatal accident and internalizes parallel guilt. The incident’s unclear specifics amplify lingering resentments and unanswered questions among those affected.

Yusuke’s abandoned film evolves into a symbolic touchstone, propelling the protagonist’s struggle to reclaim artistic purpose while navigating cascading accusations. Though his personal history remains undefined, his spectral presence permeates narrative themes of fractured trust, inherited regret, and tentative healing between estranged companions. The character’s documented influence remains strictly contained within the primary storyline.