to me it's just part of the usual anime program, most of em have a beach episode and a hot springs episode.I think it has to come already, there is still a lot of material to cover. If you have noticed, Fujino sensei's previous works have a constant that identifies him and they are the scenes of the hot springs and the visit to the beach. They are not here yet, so it may be that this will arrive.
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I feel like all of it will unfold within the hotel arc and when that concludes it'll be the end of the chapter.
Then we'll get more intense stuff in the following one