Masami Saotome is a first-year student at Shinyo Academy, who secretly carries a deep hatred for all forms of life, including himself. What sets him apart is how this rage turns him from a regular boy into something far scarier. After meeting Minako Yurihara, his path becomes twisted, leading him to acts that terrorize the school. Unlike the monster he helps, Masami chooses to kill with no end in sight, making him the true enemy that Boogiepop seeks.
There is no specific information about his height, weight, blood type, birthday, or age.
Masami Saotome is filled with a strong hatred for all living things, including himself.
Even with these dark feelings, he manages to live as a normal person at first.
He is calm and can easily hide his true nature from others.
He is not attached to anyone and sees allies as mere tools.
He shows little emotion but can be very cunning and quick to act when needed.
Masami is just a regular student at Shinyo Academy until he meets Minako Yurihara.
He is not special by birth or ability—only his overwhelming desire to end life sets him apart.
His unique path is shaped by his meeting with Minako Yurihara.
Masami Saotome is still human, but he hides his identity very well.
Even skilled investigators like Boogiepop and Nagi Kirima cannot reveal his true self for a long time.
He is smart and very good at taking advantage of small moments of weakness in others, shown when he defeats Nagi Kirima in an instant.
He is not physically strong or superhuman, but his killing intent and cunning make him more dangerous than monsters.
Masami and Minako Yurihara
Masami becomes enchanted with Minako Yurihara's ability to kill easily.
He offers to help her, even though he is an ordinary human.
Over time, Minako Yurihara becomes unable to survive without Masami's help.
To Masami, Minako Yurihara is just a tool and nothing more, but near the end, he chooses to protect her at the cost of his own life.
The Start of Hatred
Masami Saotome hides a deep hatred for all living things inside himself.
He manages to act normal and live like an ordinary student at Shinyo Academy.
Meeting Minako Yurihara
Everything changes when Masami meets Minako Yurihara.
He is drawn to her natural ability to kill and asks to work with her, even though she is not human.
Together, they form a team that becomes a serious threat inside the academy.
Master of Disguise
Masami hides his true identity so well that even Boogiepop and Nagi Kirima can't figure him out.
He stays hidden, waiting for the perfect moments to strike.
Outwitting Nagi Kirima
When Masami finally reveals himself, he surprises everyone.
He quickly sees a small weakness in Nagi Kirima, defeats her, and renders her unable to fight back.
Attachment to Minako Yurihara
Though he treats Minako Yurihara like just a tool, Masami develops a small wish to protect her.
In the end, he sacrifices himself, shielding her from Echoes's attack.
True Enemy Revealed
While it seems like Minako Yurihara is the enemy all along, Boogiepop is actually searching for Masami.
He is not just killing to survive—he kills endlessly with no goal, making him the real monster.
- Masami Saotome is known as "the one who eats people" by Boogiepop, not Minako Yurihara.
- His desire to kill never has an end point; he does not do it for survival, but just keeps going.
- He stands out as a human who is more dangerous than any monster the story has shown.
Masami Saotome is proof that an ordinary person, with enough hatred and desire, can become even more terrifying than a true monster.
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