That being said, I'll try to break down the phrase to see if I can find any relevant information:

Download as PDF or read online on Scribd. Manhwadesu Hentai Collection PDF. Iribitari Gal ni Ma〇ko Tsukawasete Morau Hanashi

In this specific story, the "Gal" is a freeloader who moves into the protagonist's space. The narrative focuses on their domestic life, which quickly evolves into an explicit sexual relationship. The appeal for fans lies in the contrast between the Gal’s high-energy, often teasing personality and the protagonist's more mundane life.

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Here's a solid report on the topic:

The Japanese title "Iribitari Gal ni Manko Tsukawasete Morau Hanashi" translates roughly to "The Story of Letting a Gal Who Hangs Around Use My [Parts]." It falls into the "Gal" sub-genre, which typically features trendy or rebellious female characters.