Kamuro Masumi

Biodata

Feature	Value
Name	Kamuro Masumi (神室真澄)
Alias(es)	“Pretty Phantom Thief” (teasing nickname used by Tatsuya Sakuya) 15
Gender	Female
Affiliation	Advanced Nurturing High School; Class 1-A
Occupation/Role	First-year student; associate and messenger of Sakamayanagi Arisu
First Appearance	Chapter 12

Appearance

Kamuro is a slender girl with purple-black long hair tied in a right-side ponytail. Her eyes are described as carrying an indifferent look. 12

• Purple-black long hair worn in a side ponytail on the right 12
• Typically maintains a cool, indifferent expression 12 23
• Her composed façade noticeably breaks when embarrassed, threatened, or caught enjoying food 12 22 23

Personality

Kamuro initially presents herself as confident, sharp-tongued, and difficult to intimidate. When Tatsuya confronts her over shoplifting, she tries to deny the accusation and threaten him with a defamation suit; once shown the recording, however, she becomes frightened and suspicious of his motives. 12

She has a petty, competitive streak and enjoys attempting to get even with Tatsuya. She claims revenge through a painful double knife-hand strike after giving him a massage, and later tries to prank him with a heavily shaken Coke. 18 23 Despite her habitual coolness, she is easily flustered by Tatsuya’s teasing and has a conspicuous appetite for his cooking. 13 22 23

Abilities & Skills

Information on Class 1-A

Kamuro is familiar with the internal political situation of Class 1-A.

• Identifies Katsuragi Kohei and Sakamayanagi Arisu as Class 1-A’s two leading figures. 13
• States that Katsuragi’s faction is more popular with ordinary students, while Sakamayanagi’s draws elite students. 13
• Carries out Sakamayanagi’s request to visit Tatsuya at least once a week for a week, nominally as a visit rather than surveillance. 23

Cooking

Kamuro begins with no apparent cooking experience but learns basic preparation under Tatsuya’s instruction.

• Washes, scores, and dices tomatoes; briefly cooks sliced beef under supervision. 23
• Helps prepare tomato beef and receives credit for part of the finished dish. 23
• Is initially unable to cook for herself. 23

Chess

Kamuro is poor at chess.

• Is unable to answer Tatsuya’s challenge during his confrontation with Sakamayanagi. 17
• Watches Tatsuya and Sakamayanagi’s match with growing seriousness as its level exceeds her understanding. 17

Relationships

• Tatsuya Sakuya — Initially catches her shoplifting and uses a recording to compel her to carry his groceries. He deletes the video after bringing her to his room and feeding her, but their relationship remains combative and full of teasing. 12 13 She later seeks confirmation that the recording is truly gone, retaliates for his treatment of her, learns cooking from him, and becomes someone he calls a friend. 22 23
• Sakamayanagi Arisu — Class 1-A’s leading figure and Kamuro’s apparent superior. Kamuro accompanies her to the Chess Club and lunch with Tatsuya, and later admits that Sakamayanagi instructed her to visit Tatsuya weekly. 16 17 23
• Karuizawa Kei — Encounters Kamuro leaving Tatsuya’s dormitory with him after their cooking session. Kei reacts jealously, while Kamuro quickly removes herself from the confrontation. 23

Story Role / Major Arcs

Shoplifting Incident

At Keyaki Mall, Kamuro exploits a surveillance blind spot to steal a can of beer. Tatsuya records the entire act, confronts her afterward, and uses the footage as leverage to make her carry his shopping bags. 12

Tatsuya takes her to his dormitory, cooks Shaxian-style food for her, and deletes the recording in front of her. During the meal, Kamuro reveals Class 1-A’s split between Katsuragi’s and Sakamayanagi’s factions. 13

Chess Club and Class 1-A Contact

Kamuro accompanies Sakamayanagi when she challenges Tatsuya at the Chess Club. She attempts to support Sakamayanagi verbally, but Tatsuya exploits her lack of chess skill to put her on the spot. 16 17

After Tatsuya and Sakamayanagi draw their match, Kamuro reluctantly joins them for lunch. She tries and fails to prank Tatsuya with a shaken Coke. 17 18

Visit to Tatsuya’s Dormitory

Kamuro visits Tatsuya to verify that he deleted the incriminating video. After obtaining confirmation, she gets revenge with knife-hand strikes, then admits that Sakamayanagi sent her to keep contact with him. 22 23

The visit shifts into a cooking lesson, during which she helps make tomato beef and shares the meal with Tatsuya. She leaves with him to dispose of the trash, only for Karuizawa to see them together. 23

Notable Quotes

“I'm merely returning tooth for tooth, so you'll know the consequences of bullying girls.” 23

Trivia

• Kamuro steals beer despite the school’s students initially receiving 100,000 Private Points each month. 12
• She claimed Tatsuya could not be trusted because his threats resembled scenarios she had seen in adult videos. 12
• She immediately claimed Tatsuya’s 100-point Line red packet after ignoring his messages, exposing that she had been online. 15