Henneko is making it difficult for me to choose a favourite heroine. Tsukiko's deadpan moe, coupled with Ogura's voice, is adorable but Azusa's tsundere antics are also a miracle of the universe!
Azusa's problem was solved faster than I thought. Tsukiko's flashback felt a bit of a retcon to me, because she didn't seem to recognize Youto in the first episode. It's also difficult to accept that Youto cannot recognize Tsukiko by her voice and hairdo. However it's just a minor gripe in a surprisingly good show. I like that, despite the title, this show isn't a total fanservice fest.
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Tibi, magnum Innominandum,
signa stellarum nigrarum
et bufaniformis Sadoquae sigilim.
(De Vermis Mysteriis)