Sewing machine love story The White cat’s divine cat scratching post New times, new hell Red Bean Ice My wife is straight Sharing Rain and Dew The Emperor is always unhappy In most of them, ML is the tsundere not MC
So. If you want an MC that is a tsundere or someone who gradually warms up in the story, then I would recommend I Was Once a Legend. But OP, not sure if you want more of an action and serious genre or fluffy genre.