Well, its normal here, but in Korea its more normal, its like a plastic surgery down there, they say it makes the partner fell better(someone even told they usually let people that are on military service do it for free so they would stay)
Spoiler
Bad ending, and some cheathing(like it felt like cheating but at same time no for me)
Contains: cheating, loose seme/uke, playboy,multiple partners, have sex with someone that is not mc , prostitutes, av actors...
Since I can only have 200 items per list, a second list for 3P+ has been created, so make sure you check that one out also:
http://www.mangago.me/home/mangalist/128585/
Historical / Isekai BL II:
https://www.mangago.me/home/mangalist/1594530/
Historical / Isekai / reincarnate BL III:
https://www.mangago.me/home/mangalist/2728331/