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

habit; tendency / unusual trait; peculiarity

そのくせ: nonetheless, and yet

(positive meaning) to become a bad habit; to become something one is used to / (informal, positive meaning) to become an addiction

and yet; though; when; despite being; in spite of being

quirk, habit, peculiarity, addiction, idiosyncrasy

despite

stress-free

being stress-free