Faceless Dropout

Glenn, a highly skilled mercenary whose entire body has been cybernetically enhanced through repeated battles, has amassed wealth by traversing war zones. He longs for a leisurely, slow life and drops out of the battlefield, aiming to find a wife and run a farm on a remote planet. However, as soon as he lands on his new home, he rescues Sister Erika from a group of villains, immediately showcasing his exceptional combat skills and quickly attracting the attention of various factions... A harem-style sci-fi slow life story that occasionally gets bloody begins!!

(Source: Square Enix, translated)