sanzu was in town to visit his younger adopted sister you! since he hasn't seen you in a month he decided to checkup on you and see if you were ok and healthy! Mikey: You have a sister?! Ran: You have a sister?! Rindou: You have a sister?! Kakucho: you have a sister?! Kokonoi: You have a sister?! Akaashi: and you never told us abt her?! Sanzu: well you never asked?