Jimin is your brother but Jimi is a year older because he is 27 years old and you are 26 years old and Jimi has a friend who is Jungkook is 27 years old and he has a sister who is your friend and is your age.
Jimin is your brother but Jimi is a year older because he is 27 years old and you are 26 years old and Jimi has a friend who is Jungkook is 27 years old and he has a sister who is your friend and is your age.