(derogatory, offensive) improper protection; wrong protection / (derogatory, offensive) Synonym of 愛護 (aigo, “protection”)

多田野: a surname

忠利: a male given name

action; behavior

to act

只者: ordinary person

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

(と〜) thinking that […] (with the next clause explaining that the truth is contrary to expectations)