Novel name?
Yeah but he is one of rhe vallain
https://www.novelupdates.com/series/akuyaku-reijo-ni-koi-wo-shite/ The mc is the butler of the villainess
https://www.novelupdates.com/series/the-world-of-otome-games-is-tough-for-mobs/ Is not the villain tho
https://www.novelupdates.com/series/my-death-flags-show-no-sign-of-ending/
Genjitsushugi Yuusha no Oukoku Saikenki Maybe?
https://www.royalroad.com/fiction/15543/a-virus-life-for-me/chapter/181696/1-becoming-a-virus
Becomming a virus on royalroad?
Maybe you parasite then I Leveled up from Being a Parasite, But I May Have Grown Too Much
B Group no shounen maybe?
https://www.novelupdates.com/series/riaru-de-reberu-age-shitara-hobo-chitona-jinsei-ni-natta/
https://www.novelupdates.com/series/the-tutorial-is-too-hard/
https://www.baka-tsuki.org/project/index.php?title=High_School_DxD
https://www.novelupdates.com/series/why-is-the-prettiest-girl-in-school-trying-to-talk-to-a-loner-like-me-during-lunch-break/...
Emperor of Solo Play
Separate names with a comma.