Niji

“I’ll repay that 450 thousand for you…but in exchange, you’re mine.” Due to the debt left behind by his father, alpha Seo Taeyoon is at the mercy of Park Jae-in, a mob boss with a penchant for violence. But when Taeyoon is able to identify Jae-in as an omega by scent alone, the ruthless criminal is taken aback – because nobody should be able to smell his pheromones. Seeing this as his opportunity to regain what once was lost, Jae-in offers to pay off Taeyoon’s father’s loan in exchange for a life of servitude. Now Jae-in holds the key to both the physical and metaphorical locks around Taeyoon’s neck. And so begins their relationship as master and slave...but there's no telling how it will end.

University student Jaemin loves all things small and adorable, but his large height and timid nature makes him shy away from expressing such interests. At his part time job at a cafe, he meets a customer named "Jiwoon." Upon seeing his smiling face, Jaemin can't stop himself as he asks if he could touch him…!Original Webtoon Official Japanese Translation