six-year secondary school (type of school introduced in the 1998 revision of the Japanese School Education Law)

to commute, to go back and forth, to ply between, to attend (school)

medium grade, medium class / middle level

one’s own younger brother / a younger male / (Kagoshima) younger brother

younger brother / younger male

a younger sibling

(chiefly women's speech) first person singular pronoun: I, me

Alternative spelling of 私達 (“we; us”)

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness