Gondwana no Nemuriゴンドワナの眠り; Gondwana’s Slumber; Kondowana no Nemuri

On a class trip to a museum, Kasama takes notice of his classmate Takagi, who he knows doesn’t talk to other people much. But as the latter enters a curiously shining door and realizes Takagi can see "it" as well, even his interest in the classmate is woken.