>>717345326 (OP)
It's a story about things called "hollows" that are like pocket dimensions that twist the area they've eaten. Inside is "ether" which has a corrupting factor on living things. The PC character is a pair of siblings (you pick boy or girl) who operate a business in guiding people through the hollows illegally. They find a powerful AI who lives in their house now and are currently wrapped up in some cult shit where people are willingly corrupting themselves.
It's gacha so most of the girls are only relevant for their story patches. The bitch in your pic's banner ends in a few hours so good luck trying to get her if you decide to play. The gameplay is okay, some characters are more simple than others and sometimes the effort given:numbers gained ratio between characters is really off balance (Miyabi versus any other damage unit, for example).