One-on-one, no cheating + younger-man nurturing romance + older woman/younger man + strong heroine
Younger loyal puppy, sweet on the outside and scheming within vs. a ruthless Medusa
(The male lead starts out as a weak younger boy who suffers all kinds of abuse, but he grows stronger later. The heroine is always powerful and clear-headed, protecting him.)
She said, “Kid, we can never be together.”
He said, “There’s nothing impossible in this world, Sis. You know I’ve been yours since I was ten.”
Later, she said, “Raising a younger man really is the best.”
The younger man said nothing, just secretly grinning with smug delight.
