Junsei Honey Boy?

Synopsis

Rinrin Yuuki, a girl, falls in love with Kuse, the owner of a cafe staffed by attractive men. To get closer to him, she disguises herself as a boy named Yuuki and begins working at the cafe. However, Kuse proves to be very strict with her in her male persona and shows no romantic interest in "Yuuki." Rinrin struggles to convey her true feelings while maintaining her disguise.