Dear Sa-chan

-Both have university student female leads
-Both have childish like female leads
-Both have mature and sexual content
-Both have cold/aloof male leads

After moving to Tokyo for college, Kyosuke finds himself torn between his long-distance girlfriend, Sa-chan, and his beautiful, married neighbor, Shino.

Kagiya Shino is the daughter of the president of "Kajiya Foods", a long-established confectionery manufacturer and is currently working in the company under the PR department. Shino's father arranged a political marriage and has Shino engaged to Tachibana Hajime, an aces in the Sales department. Based on his looks, personality, qualifications, Tachibana seems to be a perfect fiancé, but three years have passed since their engagement, and Shino is still frustrated by the lack of progress beyond a kiss. One day, a new employee, Hanazawa Yui, is assigned to the Sales department, and Shino feels a stirring in her chest when she sees Tachibana interacting with Yui as her supervisor.