The third episode was really interesting since it delves into Chihaya's past a little bit, and the insecurities that always followed him up until now, his mother playing the huge part in it. I don't know, but I think that it was hinted and this episode sort of expanded on that issue.
The kiss scene between Kaoruko and Chihaya was really beautiful, and the fact that they're both Elders sort of gives the Princess x Princess vibes despite the latter being a trap, to say the least.
Overall good and final episode it seems, but I felt the ending and the overall resolution felt lacking. None the less the series was great and the overall experience was totally worth taking, at least to me. The Chihaya x Kaoruko moments were really cute and totally amazing. Awesome pairing.