Yari Oni Musou

An old soldier returns with a spear in his hand. Everything in the world is trying to break him.

Chui, an old soldier who has lived his entire life striding on the battlefield, is consumed by the resentment of those he has killed, and ends up dying. When Chui opens his eyes again, for unknown reasons, he has regressed to his childhood, when he had not yet learned martial arts and worked as a plowman. Returning, Chui arrives at the Hojeongmun Gate, recalling Ho Ye-Yang, his lover from his past life. However, she is a completely different person from the Ho Ye-Yang he met in the military in his past life, pure and bright. It turns out that Ho Ye-Yang had enlisted in the military as a refugee after her family was ruined by a conspiracy from another clan...

Seeing the young Ho Ye-Yang, who is so different from his past life, Chui resolves to repay the kindness he received from Ho Ye-Yang in his past life and to seek revenge on those who ruined her.

(Source: Kakaopage, translated)