Hitori de Nomeru mon!

Mei Benikawa is 28-years-old. She works in the public relations department for a cosmetics company. She is beautiful and does her job so well that she was chosen as the leader of the public relations department at a relatively young age. Mei Benikawa is also the target of jealousy by her co-workers. Rumors exist that she goes overboard, eating only healthy foods to maintain her appearance. In reality, Mei Benikawa enjoys drinking alcohol alone at a chain restaurant on her way home from work. She treats herself to this as a reward for working hard. She drinks alcohol and eats alone for a low price. Doing this, Mei Benikawa encourages herself for tomorrow.
(Source: AsianWiki)
~~ Adapted from a manga of the same name by Konari Misato.