To be honest, this anime only caters fans who know them or get to know them from Drama CD or concert (As usual TsukinoPro do with their anime (tsukiani, proani)). There are bunch of stories that implied to Drama CD (A lot) even Seiyuu Concert. For casual anime watchers, this anime indeed will be quite boring because this franchise route is mostly for slice of life that hmmm quite far intense and deep from Drama CD (I mean drama CD story is more kinda enjoyable). If you are looking for slice of life that to related to yours, I do recommend this series because thestory revolves to their actual life (except Tsukihanakagura AU in ep 9 and 10).

For ep 9 and 10 was in setting of Tsukihanakagura, this AU was published in 2019 at Animate Girl Festival 2019. Actually, almost all unit TsukinoPro get their own setting. And in Vazzani we know about fraction of Kikyo (Vazzy) and Botan (Rock Down). Alive story for Tsukihanakagura was adapted into playstage, Seiran (revolves around SOARA) and Asagi (Growth) and will adapted into drama CD for next year.