Community ended its first season by playing off a theme on many other shows: a main character must choose between future loves.
It sort of came out of nowhere, but Professor Slater returned and said she wanted to get back together with Jeff. Realizing this, Britta upped her game a bit and the pair openly made it a competition for Jeff.
Finally, at the year-ending dance, Britta announced to everyone that she loved Jeff. Slater soon followed. Jeff had no idea what to say or do, so he just left the scene and ran into Annie. She had told him earlier than she was transferring to Delaware with Vaughn, but she chose to come back (again, mocking other shows). Jeff told her what transpired, she laughed - and the episode/season ended with them making out!
In other news, Troy accepted an invitation to move in with Pierce.