i would have to agree with the others. i dont think there is any way you can clean up in 1 day. i would just put on the bullshit mode and pretend that you are really serious about quiting and stuff. make them think you are all good now and play it off real well and act all mature and talk to them and stuff. parents will fall for the good kid act and then in a month or so you can be flying back on high street. good luck with the parents.