“I want you to be even more and more into me...!" Deep caresses transform her body little by little... Her childhood friend's sweet obsession never stops! One day Yuzuki, an office worker living on her own, gets a phone call from her mother. Her mother wants her to lend her childhood friend Haru a room!? Yuzuki is about to say no when she is drawn in with the promise of halving her rent and so says OK to letting him live with her. While at first caught off guard by how big Haru has grown, she soon begins to feel a sense of what he used to be like as they talk about nothings. She feels like she needs to protect Haru as he is like a little brother to her! Then with a sudden “I have changed. And it's all thanks to you." Haru's visage changes!? With a caress to make you melt and a deep and dark desire... her whole body is going to be drowned in love!