 If you liked
Koukaku no Regios
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 ...then you might like
Sword Art Online: Aincrad
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Both have similar feel as a dark reality of death that hang over the peaceful lives of the characters. The protagonist in SAO is also very similar to layfon as they are both socially awkward, are self-critisizing, have a dark haunting past, and extrememly overpowerly strong.