Other World Assassin Life of a Man who was a Shut-in

Other World Assassin Life of a Man who was a Shut-in summary:

A man with 7 years experience as a shut-in is in another world!
The abundantly talented Satou Yuuma dies suddenly, the G.o.d who thought it to be wasteful transfers him to another world.
Armed with a growth cheat from G.o.d, as well as the mysterious Sign Isolation skill.
A seemingly simple skill which in fact is hiding unthinkable capability&h.e.l.lip;