Kyuutei wo Kubi ni Natta Shokubutsu Madoushi wa Slow Life wo Ouka Suru: Nonbiri Sekaiju wo Sodatetara, Saikyou Ryouchi ga Dekimashita

The strongest mage who can't hide his cheat begins the slow life he has longed for! In his previous life, he died of exhaustion after a life as a corporate slave. After his reincarnation, he is revered as a hero for using his rare "plant magic" skill to end the war, but he is framed by his colleague