(literary) they

(education) high school; senior high school

can become / can get used to / can grow accustomed to

time / an event, case, occasion, moment; a specific period in time / a time of something / a season / a tense / (literary) the time during which a narrative takes place

to begin

a female given name

馴鮨, 熟鮨: narezushi

(slang) remaking oneself to be conspicuous (more social, etc.) upon entering high school

time of..., time for...

a female given name