Manga by author Han joong wueol ya - Status ongoing

After being held in disdain and having his life put in danger, an orphan from the Demonic Cult, Cheon Yeo-Woon, has an unexpected visit from his descendant from the future who inserts a nano machine into Cheon Yeo-Woon body, which drastically changes Cheon Yeo-Woon life after its activation. The story of Cheon Yeo-Woon journey of bypassing the Demonic Cult and rising to become the best martial artist has just begun.

[From the author of Nano Machine:] With his dantian shattering from a ki rampage, So WoonHwi was cast aside by his family.After that, he was kidnapped by the Blood Cult, where he spent his life as a third-rate spy.One day, he's killed after being used to find the legendary Secret Records of the Sword Sage.But instead of really dying, he wakes up 10 years in the past on the day he was kidnapped by the Blood Cult, along with the power to hear the voices of swords.