Oogata Shinjin no Kyouikugakari
Muromiya is a short salaryman who gets teased a lot because of his height and gets assigned to train new employee Sera, who’s super tall. It’s pretty obvious that Sera thinks Muromiya is super cute, and one day after a drinking party they kiss...
Note: Contains the extra "Oogata Shinjin to Kyouikugakari" (大型新人と教育係).