Baek Jihwan is used to being alone. Gay, kinky, and unapologetically himself, he never fit anywhere easily. When Seo Jaerim enters his life, Jihwan thinks he’s finally found the perfect partner. Until the truth comes out: Jaerim is straight, has a girlfriend, and wants Jihwan’s help learning BDSM for her sake. Jihwan rejects him immediately, but Jaerim keeps coming back.

Unseen by everyone else, Jaerim becomes the one presence Jihwan can’t ignore… his invisible partner.