I rent my wonderful room in my wonderful flat with my wonderful roomies (2 girls and 1 boy, all between 21 and 25 years old). Most of the time it's clean and quiet only at the weekend there could be a Party ;)
Our flat is super cozy, my room as well. You live in the middle of Berlin and have a wonderful view from our balconies on the 4th floor. I'm looking forward to host you.