Hakuouki, Amnesia Recommendations
Also based on a otome game. Character artwork is similar and is also a reverse harem anime although more on the tragedy and historical side.
Also Toma, reminds me a lot of Souji appearance wise.
Both of these are reverse harem and were originally otome games made by Otomate. The characters are a bit diffrent and so is the plot but I've been able to enjoy them even though they don't have the same plot.