To Your Eternity season 3

Fushi wakes up in modern times and is fascinated by society's evolution. However, upon seeing that his mother figure March was already adopted by a family, Fushi decides to avoid seeing her. He meets several school students fascinated by his powers and allow him to stay at their home. Fushi releases his late friends to reunite with him. As they play together, Fushi meets a young high school student similar to the hunters from the previous civilization that were obsessed with him.

Fushi casually greets the high school student but ignores her lineage. He is instead shocked more by how technology allows him to reunite with the rest of all of his reborn friends and thus Fushi creates copies of houses so that they can live together with March returning too. Meanwhile, the descendant of the hunters is depressed about the idea of living her school and a close friend.

Mizuha is attacked by a Nokker but is saved by a disguised Fushi. Upon returning home, Mizuha is told by her mother about her hatred towards her grandfather but makes her happy when telling they are not gonna move. Mizuha then explains her desire for perfection in life enough to be immortal. Her grandfather convinces her to join his cult as he tells her predecessors have always aimed to capture the immortal being, Fushi. When returning home, Mizuha is shocked to find herself with a knife and her mother dead. She runs in horror until being spotted by Fushi.

It is revealed Fushi saw Mizuha's mother's dead body, and tries to help the daughter as she claims she has no recollections of murdering her. In the next day, Mizuha finds that her mother is still alive much to her confusion. Meanwhile, Fushi and his friends try to get used to modern times by having identity cards and means to either get an education or a job. Upon hearing the mother survived, Fushi seeks wisdom from his creator, the Beholder, in regards to about the apparent revival that he saw, but the Beholder does not appear. After inviting Mizuha to his house, Fushi is told by Bon he can see the soul of Mizuha's mother in the house.

After being told by Mizuha's mother not to tell the truth about the present one being a fake likely caused by a Nokker, Fushi and his friends start an education in a school. Fushi and his friends have fun at school interacting with several students, but the former does not understand why other classmates flirt with him. While looking after Mizuha, Fushi is asked about the concept of romantic relationships that lead to marriages but Fushi does not find it interesting since he would always outlive the person he loves. Later, Tonari asks Fushi about why he revived them in the modern world, jealous of Mizuha's advances, but Fushi instead claims the modern times are the perfect one they can live in.

After failing to defeat another Nokker taking the form of a human, Fushi and Bon meet the Beholder, who is aiming to become a normal human. This confuses Fushi about what it means to be human and whether or not he actually loves others or simply wants to take advantage of them. As he wonders about it, Fushi transforms into a turtle and swims in the sea until dropping several eggs. He is found by Mizuha who offers him to explain what love is when learning the immortal is confused about it.