Dekisokonai to Yobareta Moto Eiyuu wa, Jikka kara Tsuihou Sareta node Suki Katte ni Ikiru Koto ni Shita @Comic

Stuck at a low level and lacking a god-given Gift, Allen is labeled a good-for-nothing and banished from the Duchy of Westfeldt. But little do they know, he's actually the reincarnation of a hero from another world with powers from his past life! Allen yearns for a quiet life after growing tired of heroics, so he takes his banishment in stride. Yet his trip to the remote Frontier is interrupted when an assassin attempts to take his former betrothed's life! What former hero worth his salt could stand idly by? So begins another unwanted chapter of excitement in Allen's saga!

(Source: J-Novel Club)