Hmm.. longest was 2 weeks I think. Suddenly there were too many new anime that I wanted to see and didn't leave my room until I had watched everything I wanted. My mother didn't like that though.. And I also actually had to work, but I didn't want to. (I had to work in our family's restaurant so not going wasn't a serious crime.) It was at the end of the year though so on New Year I just HAD to stop all this.
A week? Maybe two? It was back in the summer of '08 that I spent the majority of my time watchng anime and reading manga because I had just barely moved into a new neighborhood and had no social life. I only left the house if I went to media/book stores to buy manga, if I went to the library to attend the monthly anime club, if I went to my dad's for the weekend (my parents are divorced), and whenever my mom and step dad would drag me somewhere (store, vacation, etc.).
A few years back I had a serious aversion to leaving the house so I guess around the two week mark. My mother would throw the mother of all hissy fits and quite literally drag me out in the end to do something. Honestly I think it was like snapping a rubber band for her. She could stretch it all she wanted but it would always go back ^_^
These days I leave the house every day though. I dont even know what I did back then. I think read a lot, played SIMS and AOE and undoubtedly slept until around 3 in the afternoon and then took another nap at 5.
The longest I’ve ever went without leaving the house would be somewhere around the 6-8 week mark, I’m very anti sun I try to avoid the sun at all cost (sun burns)+ I’m lazy and always get my friends to come to me. Other then the one 6-8 week period around 4 days.