carrying out the real thing without practising; launching into something without practice

rehearsal

imperfective and stem (or continuative) forms of ぶっつける (buttsukeru) [ichidan]

To perform; to do; to conduct oneself; to carry out.

without preparation or warning

without preparation or warning / beginning

the real thing (of an event or action); getting serious / (entertainment) performance or (actual) recording (as opposed to a rehearsal)

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

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

he; boyfriend