What is this 'Dimensional chat?'

My name Satria.



I just ordinary man in college with part time job but when I see kid almost got crashed by truck I save him and the result? yes I'am die.



I think my life finally over but somehow reborn in uknown world with new identity as Shidou Matsumi , Normal teenager with normal family.



[Welcome to Dimensional Chat]



[You chosen as admin in this group]



[Enter your nick name]



[Preparation Ready , Now invite the group member]



[Welcome Pervert Sage]



[Welcome Evil Spirit]



[Welcome Man with Gender Equality]



[Welcome Ice Sadist]



[Welcome to Dimensional Chat]



What the hell is this 'Dimensional Chat'