Family 
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Reiko Arisugawa Edit
Masaomi greatly cares and loves his older sister, and he visits her very often. He tells Reiko that she is the most beautiful girl in the world, and is defensive of her, and gets mad if someone tries to harm her in any kind of way.
Houko Arisugawa Edit
Masaomi's mother. Not so much known about their relationship so far.
Friends and Acquaintances Edit
Kimito Kagurazaka Edit
Masaomi dislikes Kimito, mostly for Reiko's affection to Kimito. He thought that Kimito had done something or harmed Reiko, which made him very angry towards Kimito. However, Reiko told him to he didn't do anything. However, he still acts cold towards Kimito and tells Kimito to stay off Reiko, which upsets Reiko. She says that he don't have to so rude to Kimito, and if doesn't apologize, Reiko promised to never talk to Masaomi again, which made Masaomi quite sad and upset, and because of this, he dislikes Kimito even more. However, he helped Kimito and the others to prevent Reiko to getting married, because it was against her will.
