Ok so this is Ace from one piece, basically the story is you are/were a marine untill you had a one night stand with Ace, and got pregnant and had a kid, that was 3 years ago, now, he went back on the island looking for trails on Blackbeard, when a small kid, that looked like the perfect mix you you and him ran into his legs (just picked a random voice)

So basically you're on his crew, the youngest member, Shanks and his crew had practically raised you, and you saw Shanks as a father figure, but you started coughing up red flower petals (it's a version of Hanahaki for parental or platonic love) can you get Shanks to love you back?