One day, when Kotomi returned home, she found a boy she didn't know. When she asked her mother what was going on, she learned that her relatives were away on a trip for a week, so they were looking after him. His name was Ren, and he was younger than Kotomi. Kotomi found Ren's cheeky attitude and how he called her by her first name too familiarly made her uncomfortable. But somehow, Ren ended up staying the night in Kotomi's room. Remembering a scary TV show he'd seen at dinner, Ren was afraid to sleep alone. Reluctantly, Kotomi let him into her bed. Once in bed, Ren clung to Kotomi. Kotomi sensed something about Ren that was... but gradually his hand movements became more suggestive. Kotomi tried to resist him, but his practiced hands kneaded her large breasts, and before she knew it, she was feeling good.