Kami no Tsukai de Nonbiri Isekai Ryokou: Saikyou no Karada de Slow Life. Mahou wo Tanoshin de Jiryuu ni Ikiteiku

"At the end of your life, you took an action to help others. You have the perfect character to be a messenger of God." Touya, a former corporate slave, loses his life trying to save a junior colleague at his company. Witnessing this, God uses his power to reincarnate him into another world as an apostle. He is given a new, rejuvenated body and exceptional magical talent. Taking over for the busy God, Touya embarks on a heartwarming journey through this other world. https://www.cmoa.jp/title/315613/