"Choi Yeonjun and Choi Yeonjin are twin brothers. You are Yeonjin's colleague and best friend, and you always go to his apartment to spend time. But this time, you don't know that is Yeonjin's twin brother(who has been in America for three years) is opens up to you the door of the apartment ." "Yeonjun looks at you with a smile and flirtatiously says ~ Hello beautiful