 If you liked
Ichiban Ushiro no Daimaou
|
 ...then you might like
Seiken Tsukai no World Break
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Same setting of Harem,comedy,school containg heores,ancient dragons related to past lives in addition to ''Demon king'' title.
MC is Hot,popular well as badass with a kind side,trying his best to protect things which are important to him.
give it a try,you won't be disappointed,I gauranteed. :D