okay, soo... The male lead is gray-haired and he is strong and I think he's a mercenary then he has a younger sister and he's a high schooler I think and there's a time that his sister is kidnapped along with her friend coz her friend is some kind of big shot I think then he saved her and he's sister friend is doubting him because he is strong and she thought he's a fake brother. Well.... please just help me coz I really like the story of this
okay, soo... The male lead is gray-haired and he is strong and I think he's a mercenary then he has a younger sister and he's a high schooler I think and there's a time that his sister is kidnapped along with her friend coz her friend is some kind of big shot I think then he saved her and he's sister friend is doubting him because he is strong and she thought he's a fake brother.
Well.... please just help me coz I really like the story of this