he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

口笛: mouth whistle, mouth whistling

whistle with one's mouth

mood; humour; feeling / safety; well-being; one's situation

玄武: Black Tortoise

It would be good if~

(usually prefixed with ご) in a good mood

To blow (such as an instrument)

dead, dried leaf

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend