(archaic) beautiful

beautiful

(literary) they (about women or girls)

(colloquial) a girlfriend (a female partner in a romantic relationship)

(formal) Female third-person singular pronoun; she, her, girlfriend

width of the fold of eyelids with a fold (二重瞼)

蓋: lid; cap; cover / 双: pair, set of two

splitting from one into two / (especially) taking the entry tests for two schools / (especially) dating two people at once

負担: A burden, charge, responsibility; to bear a burden, charge, responsibility. / 布毯, 布単: A special cloth laid down to cover the path traveled by the procession during a shrine dedication or transfer.

(と〜) thinking that […] (with the next clause explaining that the truth is contrary to expectations)