Gilgamesh is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Tludia was on her way to become a Knight within the Order when she was unexpectedly kicked out for breaking too many weapons and – wait for it – eating too much. But that doesn’t mean she should stand idly by when she witnesses an old man about to be attacked by a band of robbers. Luckily for her – because she was a second too late – the old man did not need saving. It’s Tludia that needs saving. Much older than his appearance suggests, Tludia rekindles a long lost memory in him, and he decides to repay her for her efforts by finding a cure for her disease (with promises of food, of course). Thus begins their journey to bring life to one, and long-awaited peace to the other.