Aya and Ai have been good friends for a long time, partly because they don't have sisters. One day, the story begins when Aya moves in next to Ai's apartment. She was Ai who was enjoying her neighbor life with Aya, but one day, she heard a scream from Aya's room. She hurriedly rushed to Aya's house and Aya, who was watching a horror movie alone, hugged her and their lips overlapped. The "mischievous KISS" brought the two of them closer together.
