It does have a novel and the novel's quite famous too
which can you send me link
L I N K
Actually the links of the original translators are gone, but I did find another site though they likely stole the translations. Also, there's only a few chapters as no one picked it up unless you decide to MTL the Korean raws, which you have to pay for if you can afford it. https://m.mylovenovel.com/In-This-Life-I-Will-Be-The-Lord-10192/
Actually, you can get a free chapter every 12 hours on kakao https://page.kakao.com/home/%EC%9D%B4%EB%B2%88-%EC%83%9D%EC%9D%80-%EA%B0%80%EC%A3%BC%EA%B0%80-%EB%90%98%EA%B2%A0%EC%8A%B5%EB%8B%88%EB%8B%A4/52903324
Oh man (｡•︿•｡)
Do you guys know if it has a novel?