 If you liked
The New Gate
|
 ...then you might like
Yuukyuu no Gusha Asley no, Kenja no Susume: to, Pochi no Daibouken
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Super strong protagonist, wich were away for a long time from society, because of that their common sense differs from the decade in which they are trying to live nowadays. Bringing in many moments super Over power techniques that surprises/facinates their commarades.
As the travel they get to meet with new colleagues, that, thanks to their encounter became stronger/genius of the century.