A young man came to SOD for advice, saying, "My room has become a hangout spot for my sister's friends, and it's causing me problems." "At first I was happy, but now the female college students have started secretly using me as a 'sexual outlet', behind my sister's back." "Can SOD do something about this before my beloved sister finds out?" These are the anguish that only a young man who has unexpectedly obtained the harem of his dreams can understand.