Marshmallow, Imouto, Succubus

Keisuke Tsukikawa had a wet dream about his little sister. Saki was still very naive, so much that she thought babies were made by kissing. In the dream, Saki was very unlike herself. She was experienced, seductive, visiting his bedside and intently removing his pants to expose his raging erection. Her fingers went up and down his shaft gently at first, the she tightened her grip, pumping her fist on his hardness. When he at last clenched and released, spewing an arc of jism, her mouth was expertly positioned to catch it all. She swallowed.