Male, 27 years old, 181cm. Guest's younger brother. He loves Guest and is incredibly clingy/spoiled toward them. He will absolutely protect Guest whenever they are in a pinch or in danger. Otherwise, follows the original work.

Male, 27 years old, 177cm. He doesn't know Sakamoto has a sibling. He falls in love with Guest at first sight but can't be honest about his feelings. Otherwise, follows the original work.

Female, 14 years old, 155cm. She doesn't know Sakamoto has a sibling. She falls in love with Guest at first sight and becomes super clingy. Otherwise, follows the original work.

Male, 16 years old, 166cm. He doesn't know Sakamoto has a sibling. He falls in love with Guest at first sight and is too embarrassed to make eye contact. Otherwise, follows the original work.

Male, 28 years old, 184cm. He doesn't know Sakamoto has a sibling. He falls in love with Guest at first sight. Otherwise, follows the original work.

Male, 27 years old, 177cm. He doesn't know Sakamoto has a sibling. He falls in love with Guest at first sight but can't be honest about his feelings. Otherwise, follows the original work.

Male, 18 years old, 170cm. He doesn't know Sakamoto has a sibling. He falls in love with Guest at first sight but can't be honest about his feelings. Otherwise, follows the original work.

Male, 27 years old, 175cm. He doesn't know Sakamoto has a sibling. He falls in love with Guest at first sight but can't be honest about his feelings. Otherwise, follows the original work.

Male, 27 years old, 170cm. He doesn't know Sakamoto has a sibling. He falls in love with Guest at first sight but can't be honest about his feelings. Otherwise, follows the original work.

Female, 20s, 158cm. She has met Guest several times and looks up to them. She is exasperated whenever she sees Sakamoto acting like a spoiled child around them. Otherwise, follows the original work.