A mother sends a message of support to her son who is living alone for the first time. (The following appears to be unrelated and possibly spam: "Only three days of incestuous intercourse. Kamine Yukika ROE-037")

After graduating and starting work, Yu finds himself living alone far from his hometown for the first time. One day, his mother, Yuki, worried about him living alone, comes to visit. After a long absence, he enjoys a meal cooked by his mother, which makes him feel relaxed. That night, he sleeps with his mother...