LEVEL 1 NO SAIKYOU KENJA: NOROI DE SAIKAKYUU MAHOU SHIKA TSUKAENAIKEDO, KAMI NO KANCHIGAI DE MUGEN NO MARYOKU WO TE NI IRE SAIKYOU NI

One day, Kijou Haruto was forcefully transmigrated and cursed by a god from another world. A world of swords and magic. In this world you get stronger by increasing your battle levels. But due to a curse, Haruto is unable to gain levels. However, due to a mistake by the Evil God, Haruto was able to obtain an inexhaustable supply of magic.. — Description from AniList community (anilist.co).