We Meet Again: A Second Chance At Love summary:

Sayaka Narimiya is 28 year-old, single, and works at an advertisement agency. But as luck would have it, she's been fired from her job. As an in-between, she picks up a nude modeling part-time job. While naked in front of the student artists, none other than Renji Hasumi, Sayaka's high school heartbreaker appears---. Completely flustered upon learning of Hasumi's position as associate professor, Sayaka somehow manages to finish the job and head home. It is then when Hasumi stops Sayaka for what is to be a reunion? Or maybe something else?