junior college (vocationally oriented two- or three-year post-secondary education institution)

(historical) universities of the Empire of Japan

(historical) University of Tokyo from 1886 to 1897

Kyūjitai form of 悪夢 (“nightmare”)

(rare) a female given name

to have a dream

daydream

trance, dreamy state of mind

(idiomatic) sweet dreams!

Revealing that the entirety of a fictional story was all part of a dream the protagonist had; the "it was all a dream" ending.