I started reading this, and it seemed to be Yet Another Yuri Story Where The New Girl Crushes On Her Senpai. The tropes were signalling that straight away. Lotte was going to be the tsundere, Teti was going to be the nervous admirer, the phrase "but we're both girls!" was going to be tossed around with gay abandon, etc etc.
And then it totally went the other direction, with Lotte being the one crushing on her kouhai. Well done, that mangaka!
And yes, Nez, Hexe was certainly a breath of fresh air. Though I really also liked Lenny a great deal.