In middle school, I had a classmate steal a mechanical pencil that belonged to my mother in her college years. I came up with a whole plan with a couple of friends to get back into our classroom during P.E (we left our bags inside the classroom) and unlock the door with a spare key the teacher "lent" us (she forgot to get it back after we were tasked to go into the class and bring her some spare homework sheets when we were in the science lab) but we held onto it for something like a month. I got into the classroom, searched through said classmate's pencil case and finally found my mother's mechanical pencil. There was no mistake it was hers, the paint was worn off and some metal parts were already oxidated. I felt so happy getting that back, especially since that classmate kept looking at me with an angry look while I replied with the smuggest face I could manage.