Since his childhood, high school student Touya Senji has been frantically searching for a talent of his own due to being overshadowed by his late brother, Seiya. Lately, rumors of a serial killer associated with flower petals have circulated around his school. As he tries to not get distracted by the hearsay, his class suddenly receives a new student named Haito Luo Buffett, who is strangely interested in Touya.

The same evening, Touya and Haito stumble upon the serial killer. As the killer tries to slaughter the two, Haito uses an otherworldly power called the Branch of Reincarnation, which allows her to fend the enemy off. Known as "Returners," the people who can utilize the Branch of Reincarnation are able to retrieve talents from their former lives. The variety of talents come with issues, though, as not all Returners are willing to use their talents benevolently.

Bestowed with an ability to steal talents from other Returners, Touya is ultimately uninterested in contributing to humanity, only desiring to surpass Seiya and become the most talented person in the world. However, as working with Heito and the other benevolent Returners is the most efficient way to reach his goal, Touya joins them to fight infamous reincarnated talents that threaten the world.

[Written by MAL Rewrite]