Melty Snow

The talented and established actor Kazuki Toujou, meets a frivolous-looking young man named Rui Yukishiro at his favorite bar. They have few drinks together and hit it off more than he expected. Kazuki ends up taking care of Rui, who's completely drunk. But when they get to the hotel, Rui's attitude does a complete 180, Kazuki gets drugged and is forced into a one-night stand... A few days after that nightmare, Rui is introduced as the agency's new talent!? On top of that, he threatens to expose what happened unless Kazuki lets him live at his place.

(Source: Ichijinsha, translated)

Note: Includes one extra chapter.