 If you liked
Zaregoto Series
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 ...then you might like
Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e
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The protagonist of these light novels is someone who appears/attempts to appear as someone uninteresting and normal, and they just want to live a "normal life" - while they are actually highly abnormal existences that often throw off the plans of others with their thinking.
To some degree very similar MCs(vague, ambiguous and emotionally scarred), who want to appear normal, despite being very abnormal themselves. Both have psychological elements and exceptional character development. The characters are eccentric and extremely well written, they have amazing dynamics and the dialogue is superb.
If you enjoyed one of these series I'm sure you will like the other without fail.