Kaidou Aru-kun desu

Kitagawa, an office worker, moves into an extremely cheap property in Tokyo. However, it turns out to be haunted and has a mysterious past! In order to help the ghost Omichi find peace, Kitagawa promises to uncover the truth behind her death and clear her name. However, the only clue he has is Omichi's memory of walking along the Tokaido road in the Edo period. In search of clues to help her find peace, Kitagawa, Omichi, and Yajima, a colleague who loves the Tokaido road, embark on a "Tokaido walking trip" filled with laughter and history!

(Source: Kodansha, translated)