Renai Demo Classic

From Shoujo Crusade:

It has been many years since the Taisho era. The daily private lesson life of a merchant's daughter, Aoi and a fallen noble, Reiichirou unfolds...!?

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Story from the cover of the manga:
Many years have already passed since the Taisho era began. Sonomiya Reiichirou who is a fallen noble turned tutor, and Maruya Aoi, the daughter of a newly rich dumpling seller, start this wonderful Taisho romantic love story. Reiichirou gives Aoi-sama strict and attentive lessons to help her become familiar with being amongst the rich and the powerful! However, when night falls, the lessons quickly change to private lessons!?

A special chapter was published in the 13th issue of Hana to Yume in 2011.