彼女を寝取られましたが、学園のビッチギャル四天王（幼馴染含む）に鍛えられ、気づけば化物（モンスター）になってました。

My Girlfriend Was Stolen From Me, but I Was Trained by the Four Heavenly Kings of B*tchy Gals at School (Including My Childhood Friend) and Before I Knew It, I Had Become a Monster

The beginning of the story is a standard NTR development. From there, the main character is sexually matured after a messy summer vacation with his childhood friend and the b*tchy gals. What decision will he make when his ex-girlfriend comes crawling towards him, urging him to get back together with her….. The story itself is…

彼女を寝取られましたが、学園のビッチギャル四天王（幼馴染含む）に鍛えられ、気づけば化物（モンスター）になってました。 (Associated Names)

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