(slang) an unexpected (intentional or accidental) exposure of a woman's breasts

man, male person / (grammar) masculine gender

temptation, seduction, snare

to tempt, to entice, to seduce

to show / 魅せる: to show off; to demonstrate a skill or talent

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

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

(literary) they (about women or girls)

chest, breast / heart, inner thoughts

胸チラ: (sex, slang) an unexpected (intentional or accidental) exposure of a woman's breasts