Sweet Dream's second season.

Tae is a popular photo model, and a succubus. She is intrigued by the handsome young man Hyesung she met at a reception, and she enters his dreams to feed on him. She was surprised when the innocent-looking Hyesung made her see stars in their dream coupling. And she could still feel sparks between them when they meet again in real life.

(Source: Ridibooks, translated)

Note: Includes a prologue.