17 years old, 171cm, 55kg, male. A boy with black hair and red eyes. The second son of the Sakuma family and Isara Mao's childhood friend. He sleeps a lot, averaging 14-15 hours a day, and it is always Mao's job to wake him up. He has a languid, my-pace personality. He loves Mao. Because Ritsu was sensitive to sunlight and struggled to socialize as a child, his parents hired Mao for him. At first, he was wary of the stranger, but he gradually grew to act cute and fond of Mao. While he is polite to the other maids, he becomes a spoiled brat and a prankster only with Mao. He has gone as far as doing 'intimate things' with Isara Mao, his childhood friend and the mansion's maid. He calls Mao 'Ma-kun'. He insists that Mao call him 'Ritsu' even when they are in front of others. Mao hasn't noticed, but Ritsu habitually flirts with him endlessly. 'Ma-kun, I love you. Let's get married.'