Kakeru Ryūen/Relationships

Kakeru is a delinquent of Advanced Nurturing High School who causes trouble for anyone unfortunate to cross paths with especially those of the lower class at the school.

Albert Yamada
Albert is one of Kakeru's classmates who serve as one of his men, mainly his enforcer. He is very loyal to Kakeru and is willing to put aside his personal feelings and attack Daichi Ishizaki for failing in his task.

Mio Ibuki
For unknown reasons, she is always by his side as one of his followers however, it is clear she doesn't enjoy the pain he inflicts on others as shown when she flinched after he smashed a glass bottle on the head Daichi Ishizaki or when he had Albert Yamada beat Daichi and the others for their failure in getting Sudō expelled.

On the cruise, he was angrily confronted by Mio who made it clear that she couldn't stand nor approve of their cruelty and wanted them to stop their actions. He ignored her words by treating her like a plaything and made advances on her which infuriated her for his callous acts. After he tried to leave, she called out to him but Yamada intervened and Mio was angry and disappointed that he manipulated him into being his pawn before Yamada threw her down and Kakeru grinned at her pain.

Other Classmates
He is the representative of his class, he and his gang make sure that his orders are followers leading his fellows by fear.

Arisu Sakayanagi
They appear to be familiar with each other as Kakeru remarked on how it looked as if she established her rule in the school very quickly. He swore to her that he will take down all the classes including hers so that he could rule the school as she found his declaration interesting and accepted the challenge.

Honami Ichinose
It is shown in Episode 3, that he knows her as he greeted her when she finds him and his gang harassing Ken Sudō. When he claims his group were acting in self-defense, she sees right through his lie and reprimands his cruel actions stating if they didn't let Sudō go then she'd get security. He complied showing without protest, trying to avoid unwanted trouble.

Ken Sudō
In Episode 4, Sudō and Kakeru are shown to be on hostile terms as Kakeru and his gang made fun of Sudō for being of Class D. His words easily provoked the latter who would have attacked if Kakeru's men held him down leaving at Kakeru's mercy. Kakeru approached Sudō taunting him over how he will be expelled for failing the upcoming test and Sudō flinched when it appeared Kakeru would attack only for him to just flick his forehead. Kakeru took joy in watching Sudō suffer and his torture of him would have escalated had Honami Ichinose not intervene and threatened Kakeru with security. Kakeru had later set Sudō up to be expelled in as he had his men attack him but made it look like Sudō was the aggressor in the situation.

His plan failed due to the intervention of Kiyotaka Ayanokōji and Suzune Horikita who defended Sudō and made Kakeru's men withdraw their complaint. Kakeru was infuriated his plan to get rid of Sudō failed and punished his men for not carrying out the plan.

They met again at the pool, where in spite of their dislike for each other, Kakeru did not try to harm Sudō in anyway but was annoyed with his acts of stopping from proceeding to the change room.

Suzune Horikita
No direct interaction has been made yet, though in Episode 6 Suzune played a role in stopping his plans of getting Ken Sudō expelled and he questioned his men on who set them up and they said it was Suzune. In Episode 7, he spots her giving a speech to everyone at the pool recalling her as the girl who foiled his plans and smiled meaning he had plans for her.

They formally met on the school's cruise ship in Episode 8, Kakeru found Suzune, sitting at the bar, and addressed her by first name, giving hints that he is aware of what she did to get the complaint withdrawn. Suzune, who seemed to be very disgusted by his presence, found his arrogant attitude off-putting and told him to keep away from her but he responded by taking a picture of both her and Kiyotaka Ayanokōji, after claiming to be a fan of her and stating he had already made plans to take care of her personally, he tells her to look forward to it.