Nao is a replica created to be Sunao Aikawa’s perfect double, stepping in whenever Sunao skips school. She studies, plays sports, and lives each day for the original—until one day, Nao falls in love. Suddenly, her quiet, borrowed life blooms with secret dates and shy promises. But the more she cherishes them, the more she must hide from Sunao, who’s starting to notice the changes in her replica.
The replica Nao goes to school in Sunao's place when the basketball star Shuya joins the literature club.
On the day after a field trip, Shuya invites Nao to play hooky from school for the first time in her life.
When Nao finally returns to school, Shuya figures out her secret. Then he drops another bombshell on her.
Aki, Shuya's replica, is ordered to carry out a violent reprisal. Will Nao be able to convince him otherwise?
Nao comes back to life after an oncoming train kills her. But the event triggers an existential crisis.
Nao learns the literature club may be disbanded. Then a mystery figure threatens to expose her secret.
Nao joins Ritsuko to unmask whoever is spreading doppelgänger rumors at school.
At the school festival, Nao survives a haunted house, and Suzumi's replica unravels before the big play.
The literature club's survival all depends on the play. Can Nao deliver her lines without messing up?
Nao is stuck at home while Sunao is at school, until Aki treats Nao to a hot springs trip.
While Sunao and Shuya tour Kyoto on their school trip, Nao and Aki embark on a journey to Ryo's hometown.
Both Sunao and Nao encounter unexpected revelations that bring them closer to the truth behind replicas.
Nao and Aki reunite with Sunao and Shuya in Kyoto, only to uncover a harrowing new truth about their reality.
