Gacha wo Mawashite Nakama wo Fuyasu: Saikyou no Bishoujo Gundan wo Tsukuriagero

Synopsis

For some reason, he was invited to another world after he rolled the gacha like he usually does.
The gacha from the social game is available in his trusted smartphone.
It was a convenient and cheat tool that can give out equipment and beautiful girl characters.
He now aims to create the world's strongest army of beautiful girls in another world.