Change the World (KANZAKI Yuuya)

Change the World (KANZAKI Yuuya) manga summary: Saitō Yu'ichi, a young man without prospects, decides to kill himself at the turn of the year. However, a fateful encounter with a stranger, Mitsumune Sakutarō, who is his complete opposite, changes Yu'ichi's future in a way he could never have imagined.