Biodata
| Feature | Value |
|---|---|
| Name | Yamauchi Haruki 7 16 |
| Gender | Male 7 8 |
| Affiliation | Class D; one of its “Three Fools,” alongside Ken Sudō and Kanji Ike 7 |
| Occupation/Role | Student; accuser in the shoplifting case against Kamuro Masumi 16 |
| Status | Expelled by Chapter 137 137 |
| First Appearance | Chapter 7, “Useful Tools” 7 |
Personality
Yamauchi craves attention, recognition, and opportunities to impress girls. Kazehara Tetsu selects him as a pawn because he considers Yamauchi vain, easily deceived, and eager to show off despite lacking the ability to support his ambitions 7.
His reaction to Kamuro Masumi’s shoplifting footage reveals his willingness to exploit another person’s vulnerability. Rather than focusing on the theft, he imagines making Kamuro obey him, become his girlfriend, and serve as someone he can show off publicly 8.
During the student council inquiry, Yamauchi adopts an exaggerated righteous manner, presenting himself as an eyewitness exposing wrongdoing. His confidence turns immediately to anger when Kazehara challenges the video, and Horikita Manabu must silence his outburst 16.
Story Role / Major Arcs
Recruitment at Keyaki Mall
On the second day of school, Kazehara follows Yamauchi, Ike, and Sudō to a café in Keyaki Mall. After overhearing their conversation about girls, he approaches Yamauchi by mentioning his interest in pursuing Sakayanagi Arisu, then shows the trio footage of Kamuro stealing lipstick 7.
Kazehara’s actual objective is to manufacture a crisis for Kamuro and later appear as her rescuer. Yamauchi is chosen as a disposable intermediary whose desire for recognition makes his actions predictable 7 8.
Purchase of the Video
Kazehara demands 50,000 Personal Points for the video’s “usage rights.” Unable to afford the price alone, Yamauchi pools points with Ike and Sudō, then receives a deliberately edited copy on his phone 8.
Kazehara suggests starting with small requests, such as coffee after school or a weekend outing. Privately, he expects Yamauchi’s impatience and vanity to produce excessive demands, provoke Kamuro’s resistance, and ultimately drive him to report her to the school 8.
Student Council Inquiry
Yamauchi reports Kamuro for theft and submits the video, embellishing his account with claims that he accidentally discovered her misconduct. At the final inquiry, he falsely claims to have personally witnessed and recorded the incident, expecting the footage to secure her punishment or expulsion 14 16.
He initially welcomes Kazehara as a supporting witness. Kazehara instead calls the footage a fabricated attempt to frame Kamuro and identifies three signs of manipulation 16:
- Distorted reflection — a potato-chip package’s reflection changes in a physically impossible way.
- Spliced audio — breaks in the background noise reveal editing.
- Suspicious framing — a camera-angle change removes the upper part of Kamuro’s face.
Although Kamuro privately knows that the underlying theft really happened, Kazehara uses the edited footage’s flaws to undermine Yamauchi’s accusation 15 16. By May, the case is remembered as a false-accusation incident, and Kamuro receives sympathy from classmates who regard her as its victim 24.
Expulsion
A later passage confirms that Yamauchi and Sudō have already been expelled because of an earlier incident. The provided account does not describe Yamauchi’s disciplinary ruling or the exact timing of his removal 137.
Equipment / Items
- Mobile phone — receives Kazehara’s edited video and is presented as evidence during the student council inquiry 8 16.
- Edited shoplifting video — purchased for 50,000 pooled Personal Points; intended as leverage over Kamuro, but ultimately used to discredit Yamauchi’s case 8 16.
Relationships
- Kazehara Tetsu — manipulator whom Yamauchi mistakes for an ally; sells him the edited footage, then exposes its flaws at the inquiry 7 8 16.
- Kamuro Masumi — target of his coercive romantic intentions and subsequent shoplifting accusation 8 14 16.
- Kanji Ike — fellow member of the “Three Fools”; enthusiastically supports Yamauchi’s interest in the footage and helps fund its purchase 7 8.
- Ken Sudō — fellow member of the “Three Fools”; contributes points despite disapproving of using such tactics against Kamuro 7 8.
- Sakayanagi Arisu — girl Yamauchi expresses interest in pursuing; Kazehara uses that interest to open their café conversation 7.
- Horikita Manabu — student council president who oversees the inquiry and stops Yamauchi’s angry interruption 16.