The story begins with a distressing scene: a father viciously beating his young son simply because he believes the boy's face looks "evil." The boy, apologizing desperately, receives no solace from his passive mother, who is engrossed in TV shows. The scene then shifts to our protagonist, Toa Mi, waking up on a bus. He realizes this was just a painful memory from his past.

On the bus, Toa observes Shoggo, a notorious bully, mocking a girl named Aeka for reading a romance novel. Most students, including the so-called elite, either ignore or enjoy the spectacle. Shoggo demands Aeka's phone number in exchange for her novel, and the elites cheer for her to refuse.

Toa, disheartened by the apathy of his peers, considers intervening but doubts his own strength.

Despite his reservations, Toa stands up and demands Shoggo return the novel. Shoggo, taken aback, rudely dismisses him and mocks his courage. Takuto, the popular boy in class, intervenes, insisting Shoggo return the book, although he is indifferent to Toa's plight. Reluctantly, Shoggo complies and then turns his attention to Yasu, another student. When the teacher, known for his sleazy behavior, tells Shoggo to stop, he coldly remarks that Yasu should wait until he's no longer his student to commit suicide.

He then returns to his nap.

Toa reflects on his unexpected intervention and wonders if it was influenced by the troubling dream. Suddenly, a faint spell is cast, and everyone on the bus is teleported to a different world. In confusion, they meet Vus, a goddess who welcomes them as heroes. She explains that this world is threatened by the Great Demon Empire, which has resurfaced after being defeated 200 years ago. The goddess explains that they are summoned heroes meant to help combat this threat.

The students are skeptical, especially as they notice the lack of phone signal. The scumbag teacher attempts to charm the goddess, trying to keep the students calm. Toa, observing the ancient architecture and weaponry, starts to believe they might indeed be in another world. Takuto asks what will happen if they refuse to help, and Vus reveals that refusal means they will never return home. She further explains that returning home requires a special element known as the Demon King's Essence, obtainable either by killing the Demon King or using a special crystal to collect the essence.

Shoggo dismisses the mission as convenient for Vus and claims the Great Demon Empire is not their problem.

The goddess, desperate, begs the students to save her world. Aeka questions how they can help without special powers, but Vus insists they possess unique abilities that will soon be revealed. The students are doubtful, but their skepticism grows when Vus demonstrates the gruesome reality of the world by releasing a wild beast that devours a criminal. The students are horrified, but the goddess’s subsequent use of magic to burn the beast convinces them that cooperating is their best option.

Vus then tests the students' abilities with a crystal. Shoggo’s power makes the crystal glow brightly, and he revels in being special.

Takuto’s power is so immense it shatters the crystal, marking him as an S-class hero. Shoggo, frustrated, learns he is an A-class hero and is dismayed by his lower rank compared to Takuto. The other students, including Aeka and Ituki, are also revealed as S-class heroes, while Toa’s ability is noted as the weakest. He notices his ability has a purple glow but is disheartened when the goddess deems it the least impressive.

The goddess explains that Toa's unique skill, "Inflict Status Ailment," is largely ineffective and barely useful against low-ranking monsters. She explains that the ruins Toa will be sent to are known as the "Ruins of Disposal," where previous heroes and criminals have failed to survive.

Toa, terrified, realizes his situation is dire.

The goddess provides Toa with a meager leather bag as his unique item and explains that he will be teleported to the ruins. He protests, but the goddess, unmoved, dismisses his pleas and begins the teleportation ritual. As Toa prepares for the worst, Aeka tries to stand up for him, but Vus knocks her out with a punch, warning the others to remember the fate of those deemed failures.

Toa, seeing no support from his peers and feeling the weight of his own powerlessness, is further demoralized when Yasu, previously his ally, also treats him with disdain, emphasizing his low status as an A-class hero. The goddess, ignoring Toa's last words, completes the ritual, leaving him to face the grim reality of his new world alone.