The Hunter Wants to Live Quietly (Shounen Ai, highly recommend)
Mercenary Enrollment (also highly recommend)
The beginning after the end (maybe this counts?)
The Daughter of the Elemental King (female lead)
Lightning Degree (kinda slow)
Black haze (not sure if this counts)
Not sure what you are interested in so I kinda gave you a little bit of everything
Return of the 8th class Magician (this one I recommend if you want a op mc, doesn't fit the theme of wanting a normal life tho)
Also "Regas" this one is also shounen Ai/yaoi I think
The Silent Witch!! It’s an anime though
Does anyone has recommendation for MC who has secret identity? Either they secretly rich or is strong, but want to live normal life? I'm craving those kind of story rn, TIA!!