In the shadows of the Agatsuma Apartments during the solemn Obon season, the caretaker, Sato Ayato, navigates the building's tranquil corridors. As the season unfolds, a series of tragic events unfurl, blurring the line between celebration and despair. Caught in the midst of festivity and personal anguish, Hiro witnesses inexplicable occurrences, prompting contemplation on the symbolism of death. In a compelling tale of interconnected lives, the building becomes a silent witness to the profound mysteries and unspoken tragedies that transcend the boundaries of mortal understanding.

This is a spin-off story based on the short story "An Invitation from Thanatos" and the video "Into The Night" by YOASOBI.