幼なじみから、恋人同士、そして親の都合で兄と妹になってしまった…若い2人が秘かに中出しし続けた、いびつで禁断な愛の日常。
They started out as childhood friends, then became lovers, and then due to their parents' circumstances they became brother and sister...The story of the twisted and forbidden love that continues to unfold between the two young people in secret.