 If you liked
Tonari no Kashiwagi-san
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 ...then you might like
Omae wo Otaku ni Shiteyaru kara, Ore wo Riajuu ni Shitekure!
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Both stories feature a main character who is a closet otaku. Said characters actively try to keep this fact about themselves secret, while dealing with the fact that at least two people close to them know, or will discover this closely guarded secret. Both are also school life stories that have romantic subplots.