This was really good.
It was a great rom-com, for starters. It is in the style of Linklater's comedies: a long epic bender of a night filled with weird and endearing caricatures. The protagonists are odd and funny and in a timeless way.
But it was a really great OVA. It's technically not an OVA, I guess? It exists outside of the Tatami Galaxy spectrum, but just in the right amount: it borrows the visual language and accoutrement of TTG without making it either a rehash or an epilogue.
It was fun to watch, and delightful, and having seen the anime didn't feel like a "prerequisite" but like an added bonus.