Well, it's not really about age. It's more about the characters' feelings and circumstances. Some manhwas might challenge the idea of age and focus on true emotions instead.
The 'Am I A Daughter' manhwa might be a story about a character's self-discovery and exploration of her identity. But it could vary depending on the specific plot and themes.
The following is a table of contents for the novel I Am a Monster:
I Am a Monster Volume 1: Encounter
I Am a Monster, Volume 2: Escape from the Village
I Am a Monster, Volume 3: Searching for Treasure
I Am a Monster, Volume 4: Challenge the Master
I Am a Monster, Volume 5: In Danger
I Am a Monster, Volume 6: Becoming a Hero
I Am a Monster, Volume 7: Return to the Human World
I Am a Monster, Volume 8: Becoming a Legend
I Am a Monster, Volume 9: Final Battle
I Am a Monster, Volume 10: Sealing Monsters