俺

The protagonist.
He got hit saving a girl from getting ran over by a car but instead of dying he ended in another world.
He was called over to that world because of his ability in cooking and was soon given his own restaurant and money to supply himself.
He stumbled upon an slave trader mistreating a pair of slaves and in order to help them he used all the money he had to buy them.
The girls decided to help the protagonist in his restaurant as a thank you and from there his relationship with the slave beast girls began.