AGEHA

Tateha Shinki has been in a one-year relationship with Ageha and is ready to take their bond further by having sex. However, just as they begin, Ageha dies. Her older sister reveals that this cycle has repeated endlessly across parallel universes, with every version of Shinki and Ageha ending in Ageha's death during their attempt at intimacy. While Shinki could end the relationship to avoid this fate, his feelings for Ageha are too strong. He decides to explore every possible version of their relationship in search of a scenario where Ageha can be saved.