Lady & Oldman 

Welcome to the suburbs of Los Angeles, in the year 1963. There lives Shelly, the curious daughter of a diner restaurateur. One day she happens to come across a man who claims to have just been released from prison after serving a one hundred-year sentence. This mysterious stranger is rumored to be the "last resident" of what's known as the old detention block. But who is he really, and can he be trusted...? Sometimes they cause trouble and sometimes they solve it, this unlikely duo travels from town to town under the pseudonyms "Lady" and "Oldman"! (Source: MANGA MILLION) Note: Includes two extras chapters.