RLMP-006 Devoted playuous play: I will never let my brother become a sex offender... The self-sacrifice of an older sister who keeps letting him play her in secret from her parents. - Tsukino Sui - Tsukinoe Sui

Sui, a high school girl, supports her sickly mother and younger brother who cannot live on his own. Her brother begins to develop an interest in girls' bodies, and news reports on television highlight the rise in sex crimes… She is determined to prevent her brother from becoming a sex offender. To protect the peace of her family, she secretly offers her body as an outlet for his sexual desires, using her breasts, her mouth, her vagina… She risks her body for her brother, but the situation only worsens… She longs for a "normal life" with a smile…