The Game of Raising AV Idols

"Upon waking up, high school student Bach Allen found that everything around him had changed.
There was a new harem-building game on his phone. In this game, there were various AV idols.
By completing quests that raised the AV idols' interest level, he could increase the affection level of the AV idols.
Once the affection level reached a certain point, the AV idols would materialize in the real world and find him.
He could ask these AV idols to do anything, and they would obey, no matter how outrageous; they could cook for him, play games with him, and even sleep with him.
Until one day, Bach Allen suddenly discovered that the prettiest girl in school appeared in his game."