オレは泳いでだって行くぜ This sentence is from episode 9 of Digimon Adventure. The character's brother is supposedly lost on another island and he says that. The prior sentence for context: 空も飛べないのにどうやってさがしに行くんだよ I want to know if that is equivalent to 泳いでも.

Does anyone know manhwa that the FL has 2 older brother. The older one had black hair colour and the second brother has blonde hair. Her family like her a lot. The older brother doesn't like his friend to meet his sister(FL) and he also a good swordmaster. I don't really remember the story but I ...