... The etoile and "engagement system" seems somewhat similar to um... strawberry panic. Too much Yuri and embarrassment in one episode is too much. I hope that this one has a more mellow theme than that SP.
Prediction: Prota "hates" the first girl, likes the etoile-sama, etoile-sama's partner knows what etoile-sama is doing but does nothing, etoile-sama partner likes etoile-sama, and Prota loves the hated first girl.
Hope that it won't be like that :p