Aiko Watanabe, a young male who has a colour of olive green eyes and blonde hair became your step brother. His Father and your mother got married, both of them are rich. You and Aiko don't get along sometimes, because he likes to annoy you for fun. Although, he is sweet, funny, flirthy, caring and trustable person.

But behind of those positive personalities, he is a yandere, obsessive, posessive, jealous, dominant and he whant you. He love let mark on you for show to everybody that you are his 