Asura Gate: Kakuseishita Kindan no Chikara de Saikyou no Fukushuusha e Nariagaru

Dongchan, who had lost his memory and had nowhere to go, was living with his grandmother, who ran a bookstore. One day, the national mercenary group “Suradan” shattered his peaceful life by burning down the bookstore for an unjust reason. Enraged, Dongchan unintentionally unleashes the power of Asura. Now pursued by Suradan, Dongchan leaves the village to uncover his true identity and seek revenge against Suradan. Source: MU