Dark Skinned Beauty Thanks Average Guy in a Passionate Encounter

Our protagonist Tatsuya was living a normal life as a video game fanatic and altogether average guy. One day he stumbled upon a dark skinned beauty being attacked by dogs in an alleyway… One thing lead to another and she ended up living with him as she had nowhere else to go… With nothing of her own, she can only think of one way to thank him for his kindness…