EMOTION

The bully Choi Young-Hyun and his personal plaything Lee Min-Woo. Even when tossed about by Young-Hyun's capricious moods,
Min-Woo would simply follow obediently. Nine years after it began in middle school, one day Young-Hyun ended their relationship, overlooking one crucial thing. That the personal toy wasn't Min-Woo, but himself— he finally realized this in the unfamiliar room where he was kidnapped.

(Source: MrBlue, translated)