The Fly's Revenge

Drake was murdered by his wife, Tanya Sullivan, and his subordinate, Saxon. After his death, he was reborn as a fly and bound to the 'Anger Evolution System'—as long as he enrages humans, he can accumulate Anger Points, eventually transforming into a human. He must complete his evolution before Tanya Sullivan and Saxon take over his company and harm his sister, Phoebe Drake, embarking on a path of revenge.