Pls help me find this Yaoi manhwa

Its a world where powers exist and our MC (uke) is one of the strongest and oldest heroes in that world (i think all of his comrades died in a past battle and only he survived with the guilt, was he suicidal? I don’t rmb), his power was being the only one capable of making the strongest shield to ever exist I think and he wants to live quietly after the past battle ended, but I think someone suspected him (seme maybe? I don’t rmb sorry) and my memory completely blanked out after that… I thought it was “ The Hunter Wants to Live Quietly” cuz of the similar plot but this manhwa had smuts in it. ╥﹏╥