EP 01Kaizaki Arata (27), UnemployedKaizaki Arata is twenty-seven years old and doesn't have a steady job. His parents even threaten to stop sending him money, but that's when he he meets Yoake Ryo, who has a tantalizing offer for him.
EP 02Communication Skills: ZeroArata meets Hishiro Chiziru, a girl who has zero communication skills but is trying her best to change.
EP 03You’re Old NowArata receives a grim reminder of his physical age during athletic testing.
EP 04FallKariu Rena is thrown for a loop by what she thinks is Chizuru's spiteful behavior toward her.
EP 05OverlapThings come to a head between Rena and Chizuru, which reminds Arata about a traumatic experience in his past.
EP 06This Isn’t the First TimeOnoya An and Oga Kazuomi suddenly visit Arata for a study session, after which Onoya puts the moves on Arata?!
EP 07Test Subject 001 -> 002Ryo reflects on the year before and his failure supporting test subject no. 001
EP 08RiftHonoka is distracted by her troubles and inadvertently causes an injury to Rena.
EP 09RevengeThe rift between Rena and Honoka grows ever larger as the former decides to retire from high-school volleyball, but Chizuru and Arata decide to fix things.
EP 10Everyone’s Selfish DesiresThings come to a head as Chizuru and Arata decide to confront Rena over her behavior.
EP 11A Trip to the PastArata decides to visit a grave and ends up taking a trip down memory lane.
EP 12Double PanicArata, once and for all, tries to make the dense-as-can-be Kazuomi realize what he has in his hands.
EP 13ConfessionAt the fireworks display, everyone puts their plans into motion and tries to make things work between Kazuomi and Rena. Meanwhile, a different pairing begins to take shape...The story follows Kaizaki Arata, a 27-year-old jobless man, who fails at every job interview he had after quitting his last company. His life changes after he met Yoake Ryou of the ReLife Research Institute, who offered him a drug that can change his appearance to 17-years-old and to become a subject in an experiment for one year. Thus, he begins his life as a high school student once more.
