Kanojo ga Cafe ni Kayou Wake

From Aerandria Scans:

Welcome to Hot Cafe, where the tea is delicious and the waiters are beautiful. Eisei is a high-school student who isn?t looking for a part-time job, but her handsome looks land her a job as a waiter at the trendy cafe. Even more surprising, Eisei starts to fall in love with her co-worker, Kouno. But how will Kouno react when he finds out that Eisei shouldn?t be a waiter, but a waitress?!
Follow the patrons and employees as they discover that Hot Cafe serves coffee and tea with a dash of romance.