Sent to another world to do what!?

meet Gin,he doesn't know how old he is,nor does he know what he really even is,all he knows is that he can punch stuff really hard,can control flames,and is a battle maniac,and yet what does he do? he travels the world instead,and in doing so after a rather... violent meeting with a dragon lady, who's name was Mira,the two began travelling around the world,and in a rather soon to be intimate moment,he was suddenly transported in another world!?