one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

Alternative spelling of ワイシャツ (“button-down shirt”)

binder (material or clothing used in binding or flattening the breasts)

Short for フランネルシャツ (furanneru shatsu, “flannel shirt”).

(informal) boyfriend's shirt

everything

(colloquial) current boyfriend

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all

each person