Tweek and Craig in a non established relationship get high together in whatever setting you choose. Tweek is horny and and starts getting touchy with Craig, maybe Craig hesitates before it escalates to them having really rough sex. Tweek is very loud and sensitive and scratches Craig (accidentally?), and to Craig's surprise he finds himself enjoying it. At one point maybe Tweek starts sobbing(because his body is overwhelmed in a good way, but maybe a deeper reason too👀) and Craig becomes worried and there's some nice aftercare , gentle moments between them. The state of their relationship and background is up to you . preferably bottom tweek.