Looking for a manga i forgotten

[Maziri]

The MC got isekai(transfer) while eating his lunch(?) Then he kill everyone in the room>fled>become wanted person.
Not long after his friend(three if I rember) and his gramps followed the MC friend and got isekai as well.
The gramps past is he got isekai before.

Thanks for anyone answer this

 

[undeed]

Wortenia Senki

 

[Maziri]

Wortenia Senki

Oh shit, you're right. Thank you random person