Renjou otome: Gusshorina usuge(2010)

Shinichi, who had gone away to work to rebuild the restaurant his father had ruined, returns home after three years. He has a childhood friend, Mami, whom he was planning to marry, but they sadly parted ways three years ago. The two, who still love each other, have promised to meet again, but both Shinichi and Mami are being tossed about by various temptations...