 If you liked
Kenja no Deshi wo Nanoru Kenja
|
 ...then you might like
World Teacher: Isekaishiki Kyouiku Agent
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1) Both main character are transported to another world
2) Both main character are professional in his respective area(player/assassin) in his previous life
3) Both main character have a great power yet having a little body
4) The story set in a fantasy world
5) Both main character love learn new skills