Aiyoku no Nakaba, In to You no Doukoku: Injoku wa Seifuku no Shita ni  

愛欲の半ば、陰と陽の慟哭～淫辱は制服の下に～

Sara has returned to her hometown after ten years away. She eagerly anticipates seeing Mari, an old friend with whom she made a promise to participate in a tennis competition together someday at the hill. However, upon meeting Mari, Sara discovers that her former friend has become unpleasant and hostile. Despite this, Sara tries to remain patient. Unfortunately, another problem arises for Sara: part of her body suddenly transforms into a penis-like structure, and she becomes consumed with an intense desire to satisfy her libido.