Unfinished Business

Jichan the alpha is a director at a conglomerate run by his gang but must fight to keep his rivals from stealing his position. Just when he's desperate to produce results, he's offered a promising business deal by Eugene, the director of a famous pharmaceutical company. However, Jichan's hope turns to despair when Eugene kidnaps him and uses him as a test subject for a trait converter drug. Turned into an omega and confined against his will, Jichan is forced to submit to Eugene, a merciless alpha. But why is Eugene being strangely vengeful when they barely know each other?

Note: Both 15+ and 19+ version exists.