I stumbled onto 'Kimi dake o Mamoritai' a while back, expecting another straightforward action romance. The main trio is what really sticks with you, though. There's the male lead, kind of this reluctant guardian type, whose past makes him fiercely protective but also gives him this rough, closed-off edge that slowly softens. Then the female lead isn't just a damsel; she has her own quiet strength and a backstory that complicates everything, making her need for protection feel earned, not just a plot device.
You can't forget the rival or antagonist character, either. They're not pure evil, more like a twisted reflection of the hero's own motivations, which adds a layer of moral ambiguity I wasn't expecting. Their dynamic drives a lot of the internal conflict. The supporting cast, like a loyal friend or a cynical colleague, round things out by calling the main guy on his nonsense or providing moments of dry humor that keep the tone from getting too heavy.