家出少女をゴミ屋敷で飼う夏

少女が夏休みの間中およそ４０日間家に泊めてやり、その間、ろくに外にも行かず風呂も５回程しか入らず１日中結合しているという設定。部屋には買い置きの食事を消費した残骸が溜まり布団がある場所ぐらいしか空いたスペースはありません。時には色んな恥ずかしい格好、恥ずかしいプレイもしていました。昼でも夜でもその部屋からは肉と肉のぶつかる音が聞こえています。

Wouldn't 'this' meant to be 'that' because otherwise the translation doesn't really make sense? I mean, 'this' - what's she referring to? The guy or the person in the background (verdana)?

あの人 = that person over there.

Translated:

The runaway girl's summer of being kept at the garbage estate

The setting is that the girl stayed there for about 40 days during her summer holidays, barely going outside, bathing only about 5 times and "combining" all day long. Inside the room, the wrappings of used up food stocks pile up, and the only empty space is the futon. At times, she was put in various embarrassing positions, and she also performed embarrassing kinds of erotic play. Noon or night, no matter when, from this room the sound of flesh striking flesh could be heard at all times.