What? You said this is a 3D city tour?

Good news, I have traveled through time, and I have a mature, beautiful, and amazingly fit journalist mother at home who likes to wear black stockings.
There is a model sister with a thin waist, long legs, delicate face, 36D, and who likes to wear black stockings.
There is a lively, cute, youthful and beautiful sister who likes to wear sailor suits and white stockings and is very clingy.
There is a coquettish and charming teacher aunt who likes to tease herself and wears amazing black stockings.
Moreover, before his death, his father left him a set of magical secrets, which could be used to check the feelings of girls with whom he had a relationship, their current locations, as well as some very "interesting" abilities.
Does this kind of opening sound familiar?
Yes, the bad news is that the world he lives in seems to be a world where you can easily become green in the city.
Fortunately, as a time traveler, he also has a system plug-in that is very popular on the street, so, I will - turn everything around!
(Not a fanfiction, because many heroines in this type of game have a bad start, such as the famous "A Certain Nest", so as not to let anyone down, I will not make a fanfiction, but just borrow a setting)