Guild Tsuihou Sareta Zatsuyougakari no Gekokujou: Chou Bannou na Seikatsu Skill de Sekai Saikyou

Tim, a kind-hearted scullery maid, was expelled from the Empire's leading adventurers' guild for an unreasonable accusation. He dreams of becoming the best adventurer, but he has no talent with swords or magic. At his wits' end, he sets off on a journey of disappearance with the beautiful guild leader, Lady Girne, who is the only one who believes in his innocence - but the world has yet to realise Tim's true power! His well-honed [life skills], such as cooking, washing and sewing, produce a series of miracles along the way. He repairs everyday clothes into "S-class equipment", washes stubborn "curses" clean and defeats slimes with a whisk..... He is a real stunner to those around him. Without realising it, he is also cleaning off the bad "dirt" that has stuck to his countrymen. Source: MU