I was bit surprised how they focused on Sena in this episode, I mean it's like a sudden big jump of character development by telling what Sena doing in her room.
As for fanservices well for an opening episode it's okay to have overwhelming fanservice but I hope they make it balance in next episodes.
Judging from opening I hope for better story telling and character/relation development.
Overall I still enjoy the episode, but I can't help having a little disappointment.