Satoru keeps having dreams of bathing with his aunt every night. Waking up from these dreams, he recalls the vivid scenes—feeling embarrassed yet undeniably thrilled deep inside. Living with these feelings, his world shifts when his aunt, Kokone, suddenly arrives at his home. He learns she'll be staying for about a week. Seeing her again after so long, he's struck by her beauty; she's more attractive than ever, captivating him completely. Stunned into silence, Satoru stands tense, struggling to contain the overwhelming excitement welling up within him.