Marshmallow, Imouto, Succubus

Based on the erotic game by Dwarfsoft.

Tsukikawa Keisuke 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 rag...