(slang) denpa-kei person: one who acts strangely (disconnected from reality), often having wild fantasies and often saying strange things

interest

radio wave / mobile phone signal / (slang) nonsense produced by a mentally unsound person, who is termed a 電波(でんぱ)系(けい) (denpa-kei, “radio-wave-type”) person

(slang) random and nonsensical

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

system, family / style

a piece of research, a study, investigation

to research, to study