innocent; naive; artless; unsophisticated; pure; fresh
one's first campaign; one's first battle
first flower of the season or year; first flowering on a plant; first menstruation; woman who has just reached adulthood
to win one's first battle (game, match)
(arch.) crowning a boy for the first time at a coming-of-age ceremony; noh cap with a rolled or drooping tail (indicative of nobility)
for the first time; first thing; doing something for the first time; first menstruation
meeting one's master for the first time (of a new servant); ceremony at which a new servant has his first audience with his new master