 If you liked
Yuujin Character wa Taihen desu ka?
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 ...then you might like
Zettai BL ni Naru Sekai vs Zettai BL ni Naritakunai Otoko
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Both stories are about an MC who's aware he's a background character and tries his best to stick to his role. He avoids every romantic encounter thrown at his way for his own reasons and he also often breaks the fourth wall by cracking jokes at the expense of cliches found in his genre of the story.